15641049974 has 32 divisors (see below), whose sum is σ = 25773023232. Its totient is φ = 7060096000.

The previous prime is 15641049961. The next prime is 15641050013. The reversal of 15641049974 is 47994014651.

It is a super-4 number, since 4×15641049974⁴ (a number of 42 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690579 + ... + 2696385.

It is an arithmetic number, because the mean of its divisors is an integer number (805406976).

Almost surely, 2^15641049974 is an apocalyptic number.

15641049974 is a deficient number, since it is larger than the sum of its proper divisors (10131973258).

15641049974 is a wasteful number, since it uses less digits than its factorization.

15641049974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 15641049974 in words is "fifteen billion, six hundred forty-one million, forty-nine thousand, nine hundred seventy-four".