157137978 has 16 divisors (see below), whose sum is σ = 327940416. Its totient is φ = 50101920.

The previous prime is 157137949. The next prime is 157137983. The reversal of 157137978 is 879731751.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569203 + ... + 569478.

It is an arithmetic number, because the mean of its divisors is an integer number (20496276).

Almost surely, 2^157137978 is an apocalyptic number.

157137978 is an abundant number, since it is smaller than the sum of its proper divisors (170802438).

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

157137978 is a wasteful number, since it uses less digits than its factorization.

157137978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138709.

The product of its digits is 370440, while the sum is 48.

The square root of 157137978 is about 12535.4687985731. The cubic root of 157137978 is about 539.6270607411.

The spelling of 157137978 in words is "one hundred fifty-seven million, one hundred thirty-seven thousand, nine hundred seventy-eight".