78461398152 has 48 divisors (see below), whose sum is σ = 212527764540. Its totient is φ = 26150335488.

The previous prime is 78461398139. The next prime is 78461398159. The reversal of 78461398152 is 25189316487.

78461398152 is a `hidden beast` number, since 7 + 8 + 4 + 613 + 9 + 8 + 15 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66963983076 + 11497415076 = 258774^2 + 107226^2 .

It is not an unprimeable number, because it can be changed into a prime (78461398159) 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, 507328 + ... + 643664.

Almost surely, 2^78461398152 is an apocalyptic number.

78461398152 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78461398152 is an abundant number, since it is smaller than the sum of its proper divisors (134066366388).

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

78461398152 is a wasteful number, since it uses less digits than its factorization.

78461398152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144342 (or 144335 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 78461398152 in words is "seventy-eight billion, four hundred sixty-one million, three hundred ninety-eight thousand, one hundred fifty-two".