157643816 has 16 divisors (see below), whose sum is σ = 322453440. Its totient is φ = 71656240.

The previous prime is 157643743. The next prime is 157643819. The reversal of 157643816 is 618346751.

It is not an unprimeable number, because it can be changed into a prime (157643819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895616 + ... + 895791.

It is an arithmetic number, because the mean of its divisors is an integer number (20153340).

Almost surely, 2^157643816 is an apocalyptic number.

It is an amenable number.

157643816 is an abundant number, since it is smaller than the sum of its proper divisors (164809624).

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

157643816 is a wasteful number, since it uses less digits than its factorization.

157643816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791424 (or 1791420 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 157643816 is about 12555.6288572098. The cubic root of 157643816 is about 540.2054727897.

The spelling of 157643816 in words is "one hundred fifty-seven million, six hundred forty-three thousand, eight hundred sixteen".