157565721952 has 24 divisors (see below), whose sum is σ = 312650102016. Its totient is φ = 78162521472.

The previous prime is 157565721941. The next prime is 157565721959. The reversal of 157565721952 is 259127565751.

It is a junction number, because it is equal to n+sod(n) for n = 157565721893 and 157565721902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157565721959) 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, 19381483 + ... + 19389610.

It is an arithmetic number, because the mean of its divisors is an integer number (13027087584).

Almost surely, 2^157565721952 is an apocalyptic number.

It is an amenable number.

157565721952 is a deficient number, since it is larger than the sum of its proper divisors (155084380064).

157565721952 is a wasteful number, since it uses less digits than its factorization.

157565721952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38771230 (or 38771222 counting only the distinct ones).

The product of its digits is 6615000, while the sum is 55.

The spelling of 157565721952 in words is "one hundred fifty-seven billion, five hundred sixty-five million, seven hundred twenty-one thousand, nine hundred fifty-two".