78910004157225 has 24 divisors (see below), whose sum is σ = 138138924926880. Its totient is φ = 39609727576320.

The previous prime is 78910004157223. The next prime is 78910004157233. The reversal of 78910004157225 is 52275140001987.

It is a happy number.

It is not a de Polignac number, because 78910004157225 - 2¹ = 78910004157223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (78910004157221) 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, 30945098395 + ... + 30945100944.

It is an arithmetic number, because the mean of its divisors is an integer number (5755788538620).

Almost surely, 2^{78910004157225} is an apocalyptic number.

78910004157225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78910004157225 is a deficient number, since it is larger than the sum of its proper divisors (59228920769655).

78910004157225 is a wasteful number, since it uses less digits than its factorization.

78910004157225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61890199369 (or 61890199364 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 51.

The spelling of 78910004157225 in words is "seventy-eight trillion, nine hundred ten billion, four million, one hundred fifty-seven thousand, two hundred twenty-five".