78242512252392 has 48 divisors (see below), whose sum is σ = 211907212922340. Its totient is φ = 26080787090688.

The previous prime is 78242512252391. The next prime is 78242512252409. The reversal of 78242512252392 is 29325221524287.

78242512252392 is a `hidden beast` number, since 7 + 8 + 2 + 4 + 2 + 5 + 1 + 22 + 523 + 92 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 61497999148356 + 16744513104036 = 7842066^2 + 4092006^2 .

It is a super-2 number, since 2×78242512252392² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (78242512252391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66828418 + ... + 67989134.

Almost surely, 2^{78242512252392} is an apocalyptic number.

78242512252392 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78242512252392 is an abundant number, since it is smaller than the sum of its proper divisors (133664700669948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78242512252392 is a wasteful number, since it uses less digits than its factorization.

78242512252392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096962 (or 2096955 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 54.

The spelling of 78242512252392 in words is "seventy-eight trillion, two hundred forty-two billion, five hundred twelve million, two hundred fifty-two thousand, three hundred ninety-two".