78151925056425 has 48 divisors (see below), whose sum is σ = 141028241596992. Its totient is φ = 37872867270400.

The previous prime is 78151925056379. The next prime is 78151925056441. The reversal of 78151925056425 is 52465052915187.

It is a happy number.

It is not a de Polignac number, because 78151925056425 - 2⁷ = 78151925056297 is a prime.

It is a super-2 number, since 2×78151925056425² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22070454 + ... + 25365503.

It is an arithmetic number, because the mean of its divisors is an integer number (2938088366604).

Almost surely, 2^{78151925056425} is an apocalyptic number.

78151925056425 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78151925056425 is a deficient number, since it is larger than the sum of its proper divisors (62876316540567).

78151925056425 is a wasteful number, since it uses less digits than its factorization.

78151925056425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47437978 (or 47437973 counting only the distinct ones).

The product of its (nonzero) digits is 30240000, while the sum is 60.

The spelling of 78151925056425 in words is "seventy-eight trillion, one hundred fifty-one billion, nine hundred twenty-five million, fifty-six thousand, four hundred twenty-five".