155653406 has 4 divisors (see below), whose sum is σ = 233480112. Its totient is φ = 77826702.

The previous prime is 155653403. The next prime is 155653429. The reversal of 155653406 is 604356551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604356551 = 127 ⋅4758713.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155653403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38913350 + ... + 38913353.

It is an arithmetic number, because the mean of its divisors is an integer number (58370028).

Almost surely, 2^155653406 is an apocalyptic number.

155653406 is a deficient number, since it is larger than the sum of its proper divisors (77826706).

155653406 is an equidigital number, since it uses as much as digits as its factorization.

155653406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77826705.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 155653406 is about 12476.1134172466. The cubic root of 155653406 is about 537.9222926881.

The spelling of 155653406 in words is "one hundred fifty-five million, six hundred fifty-three thousand, four hundred six".