7819968225 has 24 divisors (see below), whose sum is σ = 13609491040. Its totient is φ = 3951141120.

The previous prime is 7819968217. The next prime is 7819968229. The reversal of 7819968225 is 5228699187.

It is a happy number.

It is not a de Polignac number, because 7819968225 - 2³ = 7819968217 is a prime.

It is a super-2 number, since 2×7819968225² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (7819968229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2742424 + ... + 2745273.

Almost surely, 2^7819968225 is an apocalyptic number.

7819968225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7819968225 is a deficient number, since it is larger than the sum of its proper divisors (5789522815).

7819968225 is a wasteful number, since it uses less digits than its factorization.

7819968225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487729 (or 5487724 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 57.

The square root of 7819968225 is about 88430.5842172266. The cubic root of 7819968225 is about 1984.8833839030.

The spelling of 7819968225 in words is "seven billion, eight hundred nineteen million, nine hundred sixty-eight thousand, two hundred twenty-five".