78124611225 has 12 divisors (see below), whose sum is σ = 129166024016. Its totient is φ = 41666459280.

The previous prime is 78124611199. The next prime is 78124611247. The reversal of 78124611225 is 52211642187.

It is not a de Polignac number, because 78124611225 - 2⁹ = 78124610713 is a prime.

It is a super-2 number, since 2×78124611225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian 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, 520830667 + ... + 520830816.

Almost surely, 2^78124611225 is an apocalyptic number.

78124611225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78124611225 is a deficient number, since it is larger than the sum of its proper divisors (51041412791).

78124611225 is a wasteful number, since it uses less digits than its factorization.

78124611225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041661496 (or 1041661491 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The spelling of 78124611225 in words is "seventy-eight billion, one hundred twenty-four million, six hundred eleven thousand, two hundred twenty-five".