61345908894 has 16 divisors (see below), whose sum is σ = 122909749632. Its totient is φ = 20412314328.

The previous prime is 61345908859. The next prime is 61345908919. The reversal of 61345908894 is 49880954316.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9076834 + ... + 9083589.

It is an arithmetic number, because the mean of its divisors is an integer number (7681859352).

Almost surely, 2^61345908894 is an apocalyptic number.

61345908894 is an abundant number, since it is smaller than the sum of its proper divisors (61563840738).

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

61345908894 is a wasteful number, since it uses less digits than its factorization.

61345908894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18160991.

The product of its (nonzero) digits is 7464960, while the sum is 57.

The spelling of 61345908894 in words is "sixty-one billion, three hundred forty-five million, nine hundred eight thousand, eight hundred ninety-four".