1370640551 has 4 divisors (see below), whose sum is σ = 1566446352. Its totient is φ = 1174834752.

The previous prime is 1370640547. The next prime is 1370640553. The reversal of 1370640551 is 1550460731.

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

It is not a de Polignac number, because 1370640551 - 2² = 1370640547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1370640553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97902890 + ... + 97902903.

It is an arithmetic number, because the mean of its divisors is an integer number (391611588).

Almost surely, 2^1370640551 is an apocalyptic number.

1370640551 is a deficient number, since it is larger than the sum of its proper divisors (195805801).

1370640551 is an equidigital number, since it uses as much as digits as its factorization.

1370640551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195805800.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1370640551 is about 37022.1629703074. The cubic root of 1370640551 is about 1110.8136098616.

The spelling of 1370640551 in words is "one billion, three hundred seventy million, six hundred forty thousand, five hundred fifty-one".