61615809694 has 16 divisors (see below), whose sum is σ = 92667871296. Its totient is φ = 30726583200.

The previous prime is 61615809683. The next prime is 61615809713. The reversal of 61615809694 is 49690851616.

61615809694 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2094004 + ... + 2123224.

It is an arithmetic number, because the mean of its divisors is an integer number (5791741956).

Almost surely, 2^61615809694 is an apocalyptic number.

61615809694 is a deficient number, since it is larger than the sum of its proper divisors (31052061602).

61615809694 is a wasteful number, since it uses less digits than its factorization.

61615809694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31971.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 61615809694 in words is "sixty-one billion, six hundred fifteen million, eight hundred nine thousand, six hundred ninety-four".