157120778 has 8 divisors (see below), whose sum is σ = 238329540. Its totient is φ = 77677600.

The previous prime is 157120739. The next prime is 157120801. The reversal of 157120778 is 877021751.

157120778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155575729 + 1545049 = 12473^2 + 1243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441173 + ... + 441528.

Almost surely, 2^157120778 is an apocalyptic number.

157120778 is a deficient number, since it is larger than the sum of its proper divisors (81208762).

157120778 is an equidigital number, since it uses as much as digits as its factorization.

157120778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882792.

The product of its (nonzero) digits is 27440, while the sum is 38.

The square root of 157120778 is about 12534.7827264776. The cubic root of 157120778 is about 539.6073711998.

The spelling of 157120778 in words is "one hundred fifty-seven million, one hundred twenty thousand, seven hundred seventy-eight".