61715542616 has 64 divisors (see below), whose sum is σ = 144371572800. Its totient is φ = 24080467968.

The previous prime is 61715542591. The next prime is 61715542709. The reversal of 61715542616 is 61624551716.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527501 + ... + 633788.

It is an arithmetic number, because the mean of its divisors is an integer number (2255805825).

Almost surely, 2^61715542616 is an apocalyptic number.

It is an amenable number.

61715542616 is an abundant number, since it is smaller than the sum of its proper divisors (82656030184).

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

61715542616 is a wasteful number, since it uses less digits than its factorization.

61715542616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161388 (or 1161384 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The spelling of 61715542616 in words is "sixty-one billion, seven hundred fifteen million, five hundred forty-two thousand, six hundred sixteen".