78427863542 has 64 divisors (see below), whose sum is σ = 139530338304. Its totient is φ = 32353564320.

The previous prime is 78427863499. The next prime is 78427863551. The reversal of 78427863542 is 24536872487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121971473 + ... + 121972115.

It is an arithmetic number, because the mean of its divisors is an integer number (2180161536).

Almost surely, 2^78427863542 is an apocalyptic number.

78427863542 is a deficient number, since it is larger than the sum of its proper divisors (61102474762).

78427863542 is a wasteful number, since it uses less digits than its factorization.

78427863542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 18063360, while the sum is 56.

The spelling of 78427863542 in words is "seventy-eight billion, four hundred twenty-seven million, eight hundred sixty-three thousand, five hundred forty-two".