78298390725 has 48 divisors (see below), whose sum is σ = 130576642560. Its totient is φ = 41397681600.

The previous prime is 78298390717. The next prime is 78298390733. The reversal of 78298390725 is 52709389287.

It is an interprime number because it is at equal distance from previous prime (78298390717) and next prime (78298390733).

It is not a de Polignac number, because 78298390725 - 2³ = 78298390717 is a prime.

It is a super-2 number, since 2×78298390725² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7573810 + ... + 7584140.

It is an arithmetic number, because the mean of its divisors is an integer number (2720346720).

Almost surely, 2^78298390725 is an apocalyptic number.

78298390725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78298390725 is a deficient number, since it is larger than the sum of its proper divisors (52278251835).

78298390725 is a wasteful number, since it uses less digits than its factorization.

78298390725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210 (or 11205 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 78298390725 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, seven hundred twenty-five".