157321761786 has 64 divisors (see below), whose sum is σ = 399700258560. Its totient is φ = 44931870720.

The previous prime is 157321761761. The next prime is 157321761791. The reversal of 157321761786 is 687167123751.

157321761786 is a `hidden beast` number, since 1 + 5 + 7 + 3 + 2 + 17 + 617 + 8 + 6 = 666.

157321761786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 926026 + ... + 1082666.

It is an arithmetic number, because the mean of its divisors is an integer number (6245316540).

Almost surely, 2^157321761786 is an apocalyptic number.

157321761786 is an abundant number, since it is smaller than the sum of its proper divisors (242378496774).

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

157321761786 is a wasteful number, since it uses less digits than its factorization.

157321761786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159316 (or 159310 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The spelling of 157321761786 in words is "one hundred fifty-seven billion, three hundred twenty-one million, seven hundred sixty-one thousand, seven hundred eighty-six".