72554435669 has 2 divisors, whose sum is σ = 72554435670. Its totient is φ = 72554435668.

The previous prime is 72554435593. The next prime is 72554435687. The reversal of 72554435669 is 96653445527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70615090225 + 1939345444 = 265735^2 + 44038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72554435669 is a prime.

It is a super-2 number, since 2×72554435669² (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 (72554435069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36277217834 + 36277217835.

It is an arithmetic number, because the mean of its divisors is an integer number (36277217835).

Almost surely, 2^72554435669 is an apocalyptic number.

It is an amenable number.

72554435669 is a deficient number, since it is larger than the sum of its proper divisors (1).

72554435669 is an equidigital number, since it uses as much as digits as its factorization.

72554435669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 56.

The spelling of 72554435669 in words is "seventy-two billion, five hundred fifty-four million, four hundred thirty-five thousand, six hundred sixty-nine".