157881465 has 48 divisors (see below), whose sum is σ = 331164288. Its totient is φ = 67926528.

The previous prime is 157881457. The next prime is 157881473. The reversal of 157881465 is 564188751.

157881465 is a `hidden beast` number, since 1 + 578 + 8 + 14 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (157881457) and next prime (157881473).

It is not a de Polignac number, because 157881465 - 2³ = 157881457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 157881465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9387 + ... + 20096.

It is an arithmetic number, because the mean of its divisors is an integer number (6899256).

Almost surely, 2^157881465 is an apocalyptic number.

157881465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157881465 is an abundant number, since it is smaller than the sum of its proper divisors (173282823).

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

157881465 is a wasteful number, since it uses less digits than its factorization.

157881465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29518 (or 29515 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 157881465 is about 12565.0891361741. The cubic root of 157881465 is about 540.4767908297.

The spelling of 157881465 in words is "one hundred fifty-seven million, eight hundred eighty-one thousand, four hundred sixty-five".