7981563925 has 12 divisors (see below), whose sum is σ = 9898536096. Its totient is φ = 6384350000.

The previous prime is 7981563901. The next prime is 7981563949. The reversal of 7981563925 is 5293651897.

It is an interprime number because it is at equal distance from previous prime (7981563901) and next prime (7981563949).

It is not a de Polignac number, because 7981563925 - 2⁷ = 7981563797 is a prime.

It is a super-2 number, since 2×7981563925² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 202050 + ... + 238300.

It is an arithmetic number, because the mean of its divisors is an integer number (824878008).

Almost surely, 2^7981563925 is an apocalyptic number.

It is an amenable number.

7981563925 is a deficient number, since it is larger than the sum of its proper divisors (1916972171).

7981563925 is a wasteful number, since it uses less digits than its factorization.

7981563925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45068 (or 45063 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 55.

The square root of 7981563925 is about 89339.5988629902. The cubic root of 7981563925 is about 1998.4624787337.

The spelling of 7981563925 in words is "seven billion, nine hundred eighty-one million, five hundred sixty-three thousand, nine hundred twenty-five".