7972551994 has 32 divisors (see below), whose sum is σ = 13513651200. Its totient is φ = 3494312640.

The previous prime is 7972551991. The next prime is 7972551997. The reversal of 7972551994 is 4991552797.

It is an interprime number because it is at equal distance from previous prime (7972551991) and next prime (7972551997).

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (7972551991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500647 + ... + 516325.

It is an arithmetic number, because the mean of its divisors is an integer number (422301600).

Almost surely, 2^7972551994 is an apocalyptic number.

7972551994 is a deficient number, since it is larger than the sum of its proper divisors (5541099206).

7972551994 is a wasteful number, since it uses less digits than its factorization.

7972551994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16518.

The product of its digits is 7144200, while the sum is 58.

The square root of 7972551994 is about 89289.1482432216. The cubic root of 7972551994 is about 1997.7100452209.

The spelling of 7972551994 in words is "seven billion, nine hundred seventy-two million, five hundred fifty-one thousand, nine hundred ninety-four".