61698308478 has 16 divisors (see below), whose sum is σ = 125488085760. Its totient is φ = 20217524696.

The previous prime is 61698308461. The next prime is 61698308489. The reversal of 61698308478 is 87480389616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87144150 + ... + 87144857.

It is an arithmetic number, because the mean of its divisors is an integer number (7843005360).

Almost surely, 2^61698308478 is an apocalyptic number.

61698308478 is an abundant number, since it is smaller than the sum of its proper divisors (63789777282).

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

61698308478 is a wasteful number, since it uses less digits than its factorization.

61698308478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174289071.

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 61698308478 in words is "sixty-one billion, six hundred ninety-eight million, three hundred eight thousand, four hundred seventy-eight".