157126778 has 4 divisors (see below), whose sum is σ = 235690170. Its totient is φ = 78563388.

The previous prime is 157126759. The next prime is 157126787. The reversal of 157126778 is 877621751.

157126778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 84143929 + 72982849 = 9173^2 + 8543^2 .

It is a super-2 number, since 2×157126778² = 49377648729322568, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39281693 + ... + 39281696.

Almost surely, 2^157126778 is an apocalyptic number.

157126778 is a deficient number, since it is larger than the sum of its proper divisors (78563392).

157126778 is an equidigital number, since it uses as much as digits as its factorization.

157126778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78563391.

The product of its digits is 164640, while the sum is 44.

The square root of 157126778 is about 12535.0220582175. The cubic root of 157126778 is about 539.6142398076.

The spelling of 157126778 in words is "one hundred fifty-seven million, one hundred twenty-six thousand, seven hundred seventy-eight".