157881365 has 16 divisors (see below), whose sum is σ = 200778480. Its totient is φ = 118970880.

The previous prime is 157881349. The next prime is 157881391. The reversal of 157881365 is 563188751.

It can be written as a sum of positive squares in 8 ways, for example, as 20124196 + 137757169 = 4486^2 + 11737^2 .

It is not a de Polignac number, because 157881365 - 2⁴ = 157881349 is a prime.

It is a super-3 number, since 3×157881365³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7334 + ... + 19223.

It is an arithmetic number, because the mean of its divisors is an integer number (12548655).

Almost surely, 2^157881365 is an apocalyptic number.

It is an amenable number.

157881365 is a deficient number, since it is larger than the sum of its proper divisors (42897115).

157881365 is a wasteful number, since it uses less digits than its factorization.

157881365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26632.

The product of its digits is 201600, while the sum is 44.

The square root of 157881365 is about 12565.0851568941. The cubic root of 157881365 is about 540.4766767194.

The spelling of 157881365 in words is "one hundred fifty-seven million, eight hundred eighty-one thousand, three hundred sixty-five".