157812098778 has 48 divisors (see below), whose sum is σ = 363858955200. Its totient is φ = 49260866688.

The previous prime is 157812098771. The next prime is 157812098791. The reversal of 157812098778 is 877890218751.

It is not an unprimeable number, because it can be changed into a prime (157812098771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234900 + ... + 1356687.

It is an arithmetic number, because the mean of its divisors is an integer number (7580394900).

Almost surely, 2^157812098778 is an apocalyptic number.

157812098778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157812098778 is an abundant number, since it is smaller than the sum of its proper divisors (206046856422).

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

157812098778 is a wasteful number, since it uses less digits than its factorization.

157812098778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591811 (or 2591808 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 63.

The spelling of 157812098778 in words is "one hundred fifty-seven billion, eight hundred twelve million, ninety-eight thousand, seven hundred seventy-eight".