61456631 has 2 divisors, whose sum is σ = 61456632. Its totient is φ = 61456630.

The previous prime is 61456579. The next prime is 61456643. The reversal of 61456631 is 13665416.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61456631 is a prime.

It is a super-2 number, since 2×61456631² = 7553834987740322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61456531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728315 + 30728316.

It is an arithmetic number, because the mean of its divisors is an integer number (30728316).

Almost surely, 2^61456631 is an apocalyptic number.

61456631 is a deficient number, since it is larger than the sum of its proper divisors (1).

61456631 is an equidigital number, since it uses as much as digits as its factorization.

61456631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 61456631 is about 7839.4279765809. The cubic root of 61456631 is about 394.6295324769.

The spelling of 61456631 in words is "sixty-one million, four hundred fifty-six thousand, six hundred thirty-one".