36319981887 has 48 divisors (see below), whose sum is σ = 60562216000. Its totient is φ = 20545062912.

The previous prime is 36319981877. The next prime is 36319981903. The reversal of 36319981887 is 78818991363.

36319981887 is a `hidden beast` number, since 363 + 1 + 9 + 98 + 188 + 7 = 666.

It is not a de Polignac number, because 36319981887 - 2⁷ = 36319981759 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36319981877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11459439 + ... + 11462607.

Almost surely, 2^36319981887 is an apocalyptic number.

36319981887 is a deficient number, since it is larger than the sum of its proper divisors (24242234113).

36319981887 is a wasteful number, since it uses less digits than its factorization.

36319981887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4960 (or 4957 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The spelling of 36319981887 in words is "thirty-six billion, three hundred nineteen million, nine hundred eighty-one thousand, eight hundred eighty-seven".