78194356725 has 12 divisors (see below), whose sum is σ = 129281336576. Its totient is φ = 41703656880.

The previous prime is 78194356649. The next prime is 78194356763. The reversal of 78194356725 is 52765349187.

It is not a de Polignac number, because 78194356725 - 2⁸ = 78194356469 is a prime.

It is a super-2 number, since 2×78194356725² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 521295637 + ... + 521295786.

Almost surely, 2^78194356725 is an apocalyptic number.

78194356725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78194356725 is a deficient number, since it is larger than the sum of its proper divisors (51086979851).

78194356725 is a wasteful number, since it uses less digits than its factorization.

78194356725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042591436 (or 1042591431 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 57.

The spelling of 78194356725 in words is "seventy-eight billion, one hundred ninety-four million, three hundred fifty-six thousand, seven hundred twenty-five".