157215668 has 12 divisors (see below), whose sum is σ = 275677920. Its totient is φ = 78450552.

The previous prime is 157215661. The next prime is 157215673. The reversal of 157215668 is 866512751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157215661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37058 + ... + 41081.

It is an arithmetic number, because the mean of its divisors is an integer number (22973160).

Almost surely, 2^157215668 is an apocalyptic number.

It is an amenable number.

157215668 is a deficient number, since it is larger than the sum of its proper divisors (118462252).

157215668 is a wasteful number, since it uses less digits than its factorization.

157215668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78646 (or 78644 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 157215668 is about 12538.5672227731. The cubic root of 157215668 is about 539.7159777546.

The spelling of 157215668 in words is "one hundred fifty-seven million, two hundred fifteen thousand, six hundred sixty-eight".