157649705634 has 32 divisors (see below), whose sum is σ = 326358501120. Its totient is φ = 50708794752.

The previous prime is 157649705599. The next prime is 157649705641. The reversal of 157649705634 is 436507946751.

157649705634 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46599 + ... + 563445.

It is an arithmetic number, because the mean of its divisors is an integer number (10198703160).

Almost surely, 2^157649705634 is an apocalyptic number.

157649705634 is an abundant number, since it is smaller than the sum of its proper divisors (168708795486).

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

157649705634 is a wasteful number, since it uses less digits than its factorization.

157649705634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518634.

The product of its (nonzero) digits is 19051200, while the sum is 57.

The spelling of 157649705634 in words is "one hundred fifty-seven billion, six hundred forty-nine million, seven hundred five thousand, six hundred thirty-four".