35981897644 has 48 divisors (see below), whose sum is σ = 78900595200. Its totient is φ = 13948450560.

The previous prime is 35981897641. The next prime is 35981897681. The reversal of 35981897644 is 44679818953.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (35981897641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232237 + ... + 354820.

It is an arithmetic number, because the mean of its divisors is an integer number (1643762400).

Almost surely, 2^35981897644 is an apocalyptic number.

It is an amenable number.

35981897644 is an abundant number, since it is smaller than the sum of its proper divisors (42918697556).

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

35981897644 is a wasteful number, since it uses less digits than its factorization.

35981897644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587278 (or 587276 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 64.

The spelling of 35981897644 in words is "thirty-five billion, nine hundred eighty-one million, eight hundred ninety-seven thousand, six hundred forty-four".