61544295963181 has 2 divisors, whose sum is σ = 61544295963182. Its totient is φ = 61544295963180.

The previous prime is 61544295963167. The next prime is 61544295963259. The reversal of 61544295963181 is 18136959244516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38940832387081 + 22603463576100 = 6240259^2 + 4754310^2 .

It is a cyclic number.

It is not a de Polignac number, because 61544295963181 - 2¹⁹ = 61544295438893 is a prime.

It is a super-2 number, since 2×61544295963181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61544295663181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30772147981590 + 30772147981591.

It is an arithmetic number, because the mean of its divisors is an integer number (30772147981591).

Almost surely, 2^{61544295963181} is an apocalyptic number.

It is an amenable number.

61544295963181 is a deficient number, since it is larger than the sum of its proper divisors (1).

61544295963181 is an equidigital number, since it uses as much as digits as its factorization.

61544295963181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55987200, while the sum is 64.

The spelling of 61544295963181 in words is "sixty-one trillion, five hundred forty-four billion, two hundred ninety-five million, nine hundred sixty-three thousand, one hundred eighty-one".