157586978 has 4 divisors (see below), whose sum is σ = 236380470. Its totient is φ = 78793488.

The previous prime is 157586977. The next prime is 157586993. The reversal of 157586978 is 879685751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 138603529 + 18983449 = 11773^2 + 4357^2 .

It is not an unprimeable number, because it can be changed into a prime (157586971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39396743 + ... + 39396746.

Almost surely, 2^157586978 is an apocalyptic number.

157586978 is a deficient number, since it is larger than the sum of its proper divisors (78793492).

157586978 is an equidigital number, since it uses as much as digits as its factorization.

157586978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78793491.

The product of its digits is 4233600, while the sum is 56.

The square root of 157586978 is about 12553.3652061907. The cubic root of 157586978 is about 540.1405418370.

The spelling of 157586978 in words is "one hundred fifty-seven million, five hundred eighty-six thousand, nine hundred seventy-eight".