36440013897 has 72 divisors (see below), whose sum is σ = 62419373952. Its totient is φ = 20420164800.

The previous prime is 36440013881. The next prime is 36440013901. The reversal of 36440013897 is 79831004463.

It is not a de Polignac number, because 36440013897 - 2⁴ = 36440013881 is a prime.

It is a super-2 number, since 2×36440013897² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36440013817) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9870822 + ... + 9874512.

Almost surely, 2^36440013897 is an apocalyptic number.

It is an amenable number.

36440013897 is a deficient number, since it is larger than the sum of its proper divisors (25979360055).

36440013897 is a wasteful number, since it uses less digits than its factorization.

36440013897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 36440013897 in words is "thirty-six billion, four hundred forty million, thirteen thousand, eight hundred ninety-seven".