72576639061 has 2 divisors, whose sum is σ = 72576639062. Its totient is φ = 72576639060.

The previous prime is 72576639053. The next prime is 72576639067. The reversal of 72576639061 is 16093667527.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72519258436 + 57380625 = 269294^2 + 7575^2 .

It is a cyclic number.

It is not a de Polignac number, because 72576639061 - 2³ = 72576639053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72576639067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36288319530 + 36288319531.

It is an arithmetic number, because the mean of its divisors is an integer number (36288319531).

Almost surely, 2^72576639061 is an apocalyptic number.

It is an amenable number.

72576639061 is a deficient number, since it is larger than the sum of its proper divisors (1).

72576639061 is an equidigital number, since it uses as much as digits as its factorization.

72576639061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 72576639061 in words is "seventy-two billion, five hundred seventy-six million, six hundred thirty-nine thousand, sixty-one".