37974491261 has 4 divisors (see below), whose sum is σ = 43399418592. Its totient is φ = 32549563932.

The previous prime is 37974491249. The next prime is 37974491263. The reversal of 37974491261 is 16219447973.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16219447973 = 58613 ⋅276721.

It is a cyclic number.

It is not a de Polignac number, because 37974491261 - 2¹⁰ = 37974490237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37974491263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2712463655 + ... + 2712463668.

It is an arithmetic number, because the mean of its divisors is an integer number (10849854648).

Almost surely, 2^37974491261 is an apocalyptic number.

It is an amenable number.

37974491261 is a deficient number, since it is larger than the sum of its proper divisors (5424927331).

37974491261 is an equidigital number, since it uses as much as digits as its factorization.

37974491261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424927330.

The product of its digits is 2286144, while the sum is 53.

The spelling of 37974491261 in words is "thirty-seven billion, nine hundred seventy-four million, four hundred ninety-one thousand, two hundred sixty-one".