7972551992 has 8 divisors (see below), whose sum is σ = 14948535000. Its totient is φ = 3986275992.

The previous prime is 7972551991. The next prime is 7972551997. The reversal of 7972551992 is 2991552797.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 498284492 + ... + 498284507.

It is an arithmetic number, because the mean of its divisors is an integer number (1868566875).

Almost surely, 2^7972551992 is an apocalyptic number.

It is an amenable number.

7972551992 is a deficient number, since it is larger than the sum of its proper divisors (6975983008).

7972551992 is a wasteful number, since it uses less digits than its factorization.

7972551992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996569005 (or 996569001 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 56.

The square root of 7972551992 is about 89289.1482320220. The cubic root of 7972551992 is about 1997.7100450539.

The spelling of 7972551992 in words is "seven billion, nine hundred seventy-two million, five hundred fifty-one thousand, nine hundred ninety-two".