5637974981 has 4 divisors (see below), whose sum is σ = 5883104352. Its totient is φ = 5392845612.

The previous prime is 5637974957. The next prime is 5637974983. The reversal of 5637974981 is 1894797365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5637974981 - 2²⁶ = 5570866117 is a prime.

It is a super-2 number, since 2×5637974981² = 63573523772763900722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5637974981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5637974983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122564651 + ... + 122564696.

It is an arithmetic number, because the mean of its divisors is an integer number (1470776088).

Almost surely, 2^5637974981 is an apocalyptic number.

It is an amenable number.

5637974981 is a deficient number, since it is larger than the sum of its proper divisors (245129371).

5637974981 is a wasteful number, since it uses less digits than its factorization.

5637974981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245129370.

The product of its digits is 11430720, while the sum is 59.

The square root of 5637974981 is about 75086.4500492599. The cubic root of 5637974981 is about 1779.8130280613.

The spelling of 5637974981 in words is "five billion, six hundred thirty-seven million, nine hundred seventy-four thousand, nine hundred eighty-one".