61326605464 has 16 divisors (see below), whose sum is σ = 115589416320. Its totient is φ = 30502761120.

The previous prime is 61326605449. The next prime is 61326605513. The reversal of 61326605464 is 46450662316.

It is a super-4 number, since 4×61326605464⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 61326605464.

It is a congruent number.

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, 20066079 + ... + 20069134.

It is an arithmetic number, because the mean of its divisors is an integer number (7224338520).

Almost surely, 2^61326605464 is an apocalyptic number.

It is an amenable number.

61326605464 is a deficient number, since it is larger than the sum of its proper divisors (54262810856).

61326605464 is a wasteful number, since it uses less digits than its factorization.

61326605464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40135410 (or 40135406 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 61326605464 in words is "sixty-one billion, three hundred twenty-six million, six hundred five thousand, four hundred sixty-four".