52427518978 has 16 divisors (see below), whose sum is σ = 81361253880. Its totient is φ = 25307283456.

The previous prime is 52427518973. The next prime is 52427518993. The reversal of 52427518978 is 87981572425.

It can be written as a sum of positive squares in 4 ways, for example, as 47487818889 + 4939700089 = 217917^2 + 70283^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (52427518973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616450 + ... + 696322.

Almost surely, 2^52427518978 is an apocalyptic number.

52427518978 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

52427518978 is a deficient number, since it is larger than the sum of its proper divisors (28933734902).

52427518978 is a wasteful number, since it uses less digits than its factorization.

52427518978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91221.

The product of its digits is 11289600, while the sum is 58.

The spelling of 52427518978 in words is "fifty-two billion, four hundred twenty-seven million, five hundred eighteen thousand, nine hundred seventy-eight".