72619130981 has 2 divisors, whose sum is σ = 72619130982. Its totient is φ = 72619130980.

The previous prime is 72619130863. The next prime is 72619130989. The reversal of 72619130981 is 18903191627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45973792225 + 26645338756 = 214415^2 + 163234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72619130981 is a prime.

It is a super-2 number, since 2×72619130981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72619130989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36309565490 + 36309565491.

It is an arithmetic number, because the mean of its divisors is an integer number (36309565491).

Almost surely, 2^72619130981 is an apocalyptic number.

It is an amenable number.

72619130981 is a deficient number, since it is larger than the sum of its proper divisors (1).

72619130981 is an equidigital number, since it uses as much as digits as its factorization.

72619130981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 72619130981 in words is "seventy-two billion, six hundred nineteen million, one hundred thirty thousand, nine hundred eighty-one".