155727799631 has 8 divisors (see below), whose sum is σ = 162621803520. Its totient is φ = 148844064952.

The previous prime is 155727799621. The next prime is 155727799637. The reversal of 155727799631 is 136997727551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155727799631 - 2¹⁴ = 155727783247 is a prime.

It is a super-2 number, since 2×155727799631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155727799637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2536295 + ... + 2596968.

It is an arithmetic number, because the mean of its divisors is an integer number (20327725440).

Almost surely, 2^155727799631 is an apocalyptic number.

155727799631 is a deficient number, since it is larger than the sum of its proper divisors (6894003889).

155727799631 is a wasteful number, since it uses less digits than its factorization.

155727799631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134605.

The product of its digits is 25004700, while the sum is 62.

The spelling of 155727799631 in words is "one hundred fifty-five billion, seven hundred twenty-seven million, seven hundred ninety-nine thousand, six hundred thirty-one".