61701215008 has 24 divisors (see below), whose sum is σ = 123465652380. Its totient is φ = 30344858880.

The previous prime is 61701214909. The next prime is 61701215021. The reversal of 61701215008 is 80051210716.

It can be written as a sum of positive squares in 2 ways, for example, as 48405280144 + 13295934864 = 220012^2 + 115308^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15802663 + ... + 15806566.

Almost surely, 2^61701215008 is an apocalyptic number.

It is an amenable number.

61701215008 is an abundant number, since it is smaller than the sum of its proper divisors (61764437372).

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

61701215008 is a wasteful number, since it uses less digits than its factorization.

61701215008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31609300 (or 31609292 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The spelling of 61701215008 in words is "sixty-one billion, seven hundred one million, two hundred fifteen thousand, eight".