1481906645 has 4 divisors (see below), whose sum is σ = 1778287980. Its totient is φ = 1185525312.

The previous prime is 1481906639. The next prime is 1481906683. The reversal of 1481906645 is 5466091841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 502028836 + 979877809 = 22406^2 + 31303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1481906645 - 2²⁴ = 1465129429 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1481906596 and 1481906605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148190660 + ... + 148190669.

It is an arithmetic number, because the mean of its divisors is an integer number (444571995).

Almost surely, 2^1481906645 is an apocalyptic number.

It is an amenable number.

1481906645 is a deficient number, since it is larger than the sum of its proper divisors (296381335).

1481906645 is an equidigital number, since it uses as much as digits as its factorization.

1481906645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296381334.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1481906645 is about 38495.5405858912. The cubic root of 1481906645 is about 1140.0930069291.

The spelling of 1481906645 in words is "one billion, four hundred eighty-one million, nine hundred six thousand, six hundred forty-five".