1916972972 has 24 divisors (see below), whose sum is σ = 3584639520. Its totient is φ = 893825280.

The previous prime is 1916972963. The next prime is 1916972977. The reversal of 1916972972 is 2792796191.

It is a super-3 number, since 3×1916972972³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1916972977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121904 + ... + 136727.

It is an arithmetic number, because the mean of its divisors is an integer number (149359980).

Almost surely, 2^1916972972 is an apocalyptic number.

It is an amenable number.

1916972972 is a deficient number, since it is larger than the sum of its proper divisors (1667666548).

1916972972 is a wasteful number, since it uses less digits than its factorization.

1916972972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258761 (or 258759 counting only the distinct ones).

The product of its digits is 857304, while the sum is 53.

The square root of 1916972972 is about 43783.2499022172. The cubic root of 1916972972 is about 1242.2394866136.

The spelling of 1916972972 in words is "one billion, nine hundred sixteen million, nine hundred seventy-two thousand, nine hundred seventy-two".