61974573061 has 2 divisors, whose sum is σ = 61974573062. Its totient is φ = 61974573060.

The previous prime is 61974573053. The next prime is 61974573083. The reversal of 61974573061 is 16037547916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56484652225 + 5489920836 = 237665^2 + 74094^2 .

It is a cyclic number.

It is not a de Polignac number, because 61974573061 - 2³ = 61974573053 is a prime.

It is a super-4 number, since 4×61974573061⁴ (a number of 44 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61974572996 and 61974573014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61974573461) 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 as a sum of consecutive naturals, namely, 30987286530 + 30987286531.

It is an arithmetic number, because the mean of its divisors is an integer number (30987286531).

Almost surely, 2^61974573061 is an apocalyptic number.

It is an amenable number.

61974573061 is a deficient number, since it is larger than the sum of its proper divisors (1).

61974573061 is an equidigital number, since it uses as much as digits as its factorization.

61974573061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 61974573061 in words is "sixty-one billion, nine hundred seventy-four million, five hundred seventy-three thousand, sixty-one".