61306313278 has 32 divisors (see below), whose sum is σ = 106600550400. Its totient is φ = 25899217344.

The previous prime is 61306313239. The next prime is 61306313297. The reversal of 61306313278 is 87231360316.

It is a self number, because there is not a number n which added to its sum of digits gives 61306313278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637483 + ... + 727321.

It is an arithmetic number, because the mean of its divisors is an integer number (3331267200).

Almost surely, 2^61306313278 is an apocalyptic number.

61306313278 is a deficient number, since it is larger than the sum of its proper divisors (45294237122).

61306313278 is a wasteful number, since it uses less digits than its factorization.

61306313278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90544.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 61306313278 in words is "sixty-one billion, three hundred six million, three hundred thirteen thousand, two hundred seventy-eight".