1974376645957 has 4 divisors (see below), whose sum is σ = 1974594601440. Its totient is φ = 1974158690476.

The previous prime is 1974376645937. The next prime is 1974376645963. The reversal of 1974376645957 is 7595466734791.

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 1974376645957 - 2²⁷ = 1974242428229 is a prime.

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 1974376645957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974376645937) 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, 108964153 + ... + 108982270.

It is an arithmetic number, because the mean of its divisors is an integer number (493648650360).

Almost surely, 2^{1974376645957} is an apocalyptic number.

It is an amenable number.

1974376645957 is a deficient number, since it is larger than the sum of its proper divisors (217955483).

1974376645957 is an equidigital number, since it uses as much as digits as its factorization.

1974376645957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217955482.

The product of its digits is 1200225600, while the sum is 73.

The spelling of 1974376645957 in words is "one trillion, nine hundred seventy-four billion, three hundred seventy-six million, six hundred forty-five thousand, nine hundred fifty-seven".