78164747425 has 12 divisors (see below), whose sum is σ = 102025565680. Its totient is φ = 59240650320.

The previous prime is 78164747411. The next prime is 78164747449. The reversal of 78164747425 is 52474746187.

It is not a de Polignac number, because 78164747425 - 2²³ = 78156358817 is a prime.

It is a super-2 number, since 2×78164747425² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

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, 82278207 + ... + 82279156.

Almost surely, 2^78164747425 is an apocalyptic number.

It is an amenable number.

78164747425 is a deficient number, since it is larger than the sum of its proper divisors (23860818255).

78164747425 is a wasteful number, since it uses less digits than its factorization.

78164747425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164557392 (or 164557387 counting only the distinct ones).

The product of its digits is 10536960, while the sum is 55.

The spelling of 78164747425 in words is "seventy-eight billion, one hundred sixty-four million, seven hundred forty-seven thousand, four hundred twenty-five".