157785927550 has 48 divisors (see below), whose sum is σ = 315839753712. Its totient is φ = 58427942400.

The previous prime is 157785927521. The next prime is 157785927571. The reversal of 157785927550 is 55729587751.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1469712 + ... + 1573411.

It is an arithmetic number, because the mean of its divisors is an integer number (6579994869).

Almost surely, 2^157785927550 is an apocalyptic number.

157785927550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157785927550 is an abundant number, since it is smaller than the sum of its proper divisors (158053826162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157785927550 is a wasteful number, since it uses less digits than its factorization.

157785927550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043213 (or 3043208 counting only the distinct ones).

The product of its (nonzero) digits is 30870000, while the sum is 61.

The spelling of 157785927550 in words is "one hundred fifty-seven billion, seven hundred eighty-five million, nine hundred twenty-seven thousand, five hundred fifty".