78297184725 has 48 divisors (see below), whose sum is σ = 131535581184. Its totient is φ = 41090200000.

The previous prime is 78297184697. The next prime is 78297184739. The reversal of 78297184725 is 52748179287.

It is not a de Polignac number, because 78297184725 - 2¹³ = 78297176533 is a prime.

It is a super-2 number, since 2×78297184725² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 1537420 + ... + 1587530.

It is an arithmetic number, because the mean of its divisors is an integer number (2740324608).

Almost surely, 2^78297184725 is an apocalyptic number.

78297184725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78297184725 is a deficient number, since it is larger than the sum of its proper divisors (53238396459).

78297184725 is a wasteful number, since it uses less digits than its factorization.

78297184725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50458 (or 50453 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 60.

The spelling of 78297184725 in words is "seventy-eight billion, two hundred ninety-seven million, one hundred eighty-four thousand, seven hundred twenty-five".