157557329668 has 12 divisors (see below), whose sum is σ = 275743491660. Its totient is φ = 78773474912.

The previous prime is 157557329591. The next prime is 157557329669. The reversal of 157557329668 is 866923755751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25619843844 + 131937485824 = 160062^2 + 363232^2 .

It is a super-2 number, since 2×157557329668² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157557329669) 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, 1228771 + ... + 1350922.

It is an arithmetic number, because the mean of its divisors is an integer number (22978624305).

Almost surely, 2^157557329668 is an apocalyptic number.

It is an amenable number.

157557329668 is a deficient number, since it is larger than the sum of its proper divisors (118186161992).

157557329668 is a wasteful number, since it uses less digits than its factorization.

157557329668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594966 (or 2594964 counting only the distinct ones).

The product of its digits is 95256000, while the sum is 64.

The spelling of 157557329668 in words is "one hundred fifty-seven billion, five hundred fifty-seven million, three hundred twenty-nine thousand, six hundred sixty-eight".