61477721326 has 24 divisors (see below), whose sum is σ = 107313788736. Its totient is φ = 26337417120.

The previous prime is 61477721321. The next prime is 61477721353. The reversal of 61477721326 is 62312777416.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61477721321) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 136611 + ... + 376321.

It is an arithmetic number, because the mean of its divisors is an integer number (4471407864).

Almost surely, 2^61477721326 is an apocalyptic number.

61477721326 is a deficient number, since it is larger than the sum of its proper divisors (45836067410).

61477721326 is a wasteful number, since it uses less digits than its factorization.

61477721326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242344 (or 242337 counting only the distinct ones).

The product of its digits is 592704, while the sum is 46.

The spelling of 61477721326 in words is "sixty-one billion, four hundred seventy-seven million, seven hundred twenty-one thousand, three hundred twenty-six".