1916772310564 has 24 divisors (see below), whose sum is σ = 3475332939960. Its totient is φ = 923921263104.

The previous prime is 1916772310549. The next prime is 1916772310577. The reversal of 1916772310564 is 4650132776191.

It can be written as a sum of positive squares in 4 ways, for example, as 497600446464 + 1419171864100 = 705408^2 + 1191290^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12576549 + ... + 12728044.

It is an arithmetic number, because the mean of its divisors is an integer number (144805539165).

Almost surely, 2^{1916772310564} is an apocalyptic number.

It is an amenable number.

1916772310564 is a deficient number, since it is larger than the sum of its proper divisors (1558560629396).

1916772310564 is a wasteful number, since it uses less digits than its factorization.

1916772310564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25305279 (or 25305277 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 1916772310564 in words is "one trillion, nine hundred sixteen billion, seven hundred seventy-two million, three hundred ten thousand, five hundred sixty-four".