61605823662664 has 16 divisors (see below), whose sum is σ = 115611276395520. Its totient is φ = 30776149957200.

The previous prime is 61605823662637. The next prime is 61605823662679. The reversal of 61605823662664 is 46626632850616.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3345224484 + ... + 3345242899.

It is an arithmetic number, because the mean of its divisors is an integer number (7225704774720).

Almost surely, 2^{61605823662664} is an apocalyptic number.

It is an amenable number.

61605823662664 is a deficient number, since it is larger than the sum of its proper divisors (54005452732856).

61605823662664 is a wasteful number, since it uses less digits than its factorization.

61605823662664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690468540 (or 6690468536 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 61.

The spelling of 61605823662664 in words is "sixty-one trillion, six hundred five billion, eight hundred twenty-three million, six hundred sixty-two thousand, six hundred sixty-four".