157163640 has 64 divisors (see below), whose sum is σ = 499232160. Its totient is φ = 39444480.

The previous prime is 157163639. The next prime is 157163641. The reversal of 157163640 is 46361751.

It is an interprime number because it is at equal distance from previous prime (157163639) and next prime (157163641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157163641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36481 + ... + 40560.

Almost surely, 2^157163640 is an apocalyptic number.

157163640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157163640 is an abundant number, since it is smaller than the sum of its proper divisors (342068520).

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

157163640 is a wasteful number, since it uses less digits than its factorization.

157163640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77072 (or 77068 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 157163640 is about 12536.4923323871. The cubic root of 157163640 is about 539.6564344080.

The spelling of 157163640 in words is "one hundred fifty-seven million, one hundred sixty-three thousand, six hundred forty".