61631755461 has 12 divisors (see below), whose sum is σ = 89056495788. Its totient is φ = 41072675904.

The previous prime is 61631755459. The next prime is 61631755469. The reversal of 61631755461 is 16455713616.

61631755461 is a `hidden beast` number, since 6 + 1 + 6 + 31 + 7 + 554 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 58609504836 + 3022250625 = 242094^2 + 54975^2 .

It is not a de Polignac number, because 61631755461 - 2¹ = 61631755459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61631755469) 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, 1237650 + ... + 1286483.

It is an arithmetic number, because the mean of its divisors is an integer number (7421374649).

Almost surely, 2^61631755461 is an apocalyptic number.

It is an amenable number.

61631755461 is a deficient number, since it is larger than the sum of its proper divisors (27424740327).

61631755461 is a wasteful number, since it uses less digits than its factorization.

61631755461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526852 (or 2526849 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 61631755461 in words is "sixty-one billion, six hundred thirty-one million, seven hundred fifty-five thousand, four hundred sixty-one".