61726928481 has 48 divisors (see below), whose sum is σ = 96915087360. Its totient is φ = 37705251840.

The previous prime is 61726928479. The next prime is 61726928503. The reversal of 61726928481 is 18482962716.

It is a happy number.

61726928481 is a `hidden beast` number, since 6 + 1 + 72 + 6 + 92 + 8 + 481 = 666.

It is not a de Polignac number, because 61726928481 - 2¹ = 61726928479 is a prime.

It is a super-2 number, since 2×61726928481² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61726928381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2994496 + ... + 3015038.

It is an arithmetic number, because the mean of its divisors is an integer number (2019064320).

Almost surely, 2^61726928481 is an apocalyptic number.

It is an amenable number.

61726928481 is a deficient number, since it is larger than the sum of its proper divisors (35188158879).

61726928481 is a wasteful number, since it uses less digits than its factorization.

61726928481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21086 (or 21083 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 61726928481 in words is "sixty-one billion, seven hundred twenty-six million, nine hundred twenty-eight thousand, four hundred eighty-one".