365856981 has 24 divisors (see below), whose sum is σ = 581301504. Its totient is φ = 203958720.

The previous prime is 365856971. The next prime is 365857013. The reversal of 365856981 is 189658563.

It is not a de Polignac number, because 365856981 - 2⁷ = 365856853 is a prime.

It is a super-2 number, since 2×365856981² = 267702661092868722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (365856961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24325 + ... + 36378.

It is an arithmetic number, because the mean of its divisors is an integer number (24220896).

Almost surely, 2^365856981 is an apocalyptic number.

It is an amenable number.

365856981 is a deficient number, since it is larger than the sum of its proper divisors (215444523).

365856981 is a wasteful number, since it uses less digits than its factorization.

365856981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60761 (or 60754 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 365856981 is about 19127.3882430404. The cubic root of 365856981 is about 715.2158254353.

The spelling of 365856981 in words is "three hundred sixty-five million, eight hundred fifty-six thousand, nine hundred eighty-one".