157680787 has 24 divisors (see below), whose sum is σ = 180862976. Its totient is φ = 137214000.

The previous prime is 157680781. The next prime is 157680823. The reversal of 157680787 is 787086751.

It is not a de Polignac number, because 157680787 - 2¹⁹ = 157156499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157680787.

It is not an unprimeable number, because it can be changed into a prime (157680781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476212 + ... + 476542.

Almost surely, 2^157680787 is an apocalyptic number.

157680787 is a deficient number, since it is larger than the sum of its proper divisors (23182189).

157680787 is a wasteful number, since it uses less digits than its factorization.

157680787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 49.

The square root of 157680787 is about 12557.1010587635. The cubic root of 157680787 is about 540.2476995766.

The spelling of 157680787 in words is "one hundred fifty-seven million, six hundred eighty thousand, seven hundred eighty-seven".