157821294786 has 16 divisors (see below), whose sum is σ = 315939537984. Its totient is φ = 52557606864.

The previous prime is 157821294749. The next prime is 157821294817. The reversal of 157821294786 is 687492128751.

157821294786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×157821294786² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12365941 + ... + 12378696.

It is an arithmetic number, because the mean of its divisors is an integer number (19746221124).

Almost surely, 2^157821294786 is an apocalyptic number.

157821294786 is an abundant number, since it is smaller than the sum of its proper divisors (158118243198).

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

157821294786 is a wasteful number, since it uses less digits than its factorization.

157821294786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24745705.

The product of its digits is 13547520, while the sum is 60.

The spelling of 157821294786 in words is "one hundred fifty-seven billion, eight hundred twenty-one million, two hundred ninety-four thousand, seven hundred eighty-six".