72554493927397 has 2 divisors, whose sum is σ = 72554493927398. Its totient is φ = 72554493927396.

The previous prime is 72554493927389. The next prime is 72554493927431. The reversal of 72554493927397 is 79372939445527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65092849904196 + 7461644023201 = 8068014^2 + 2731601^2 .

It is a cyclic number.

It is not a de Polignac number, because 72554493927397 - 2³ = 72554493927389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72554493927367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36277246963698 + 36277246963699.

It is an arithmetic number, because the mean of its divisors is an integer number (36277246963699).

Almost surely, 2^{72554493927397} is an apocalyptic number.

It is an amenable number.

72554493927397 is a deficient number, since it is larger than the sum of its proper divisors (1).

72554493927397 is an equidigital number, since it uses as much as digits as its factorization.

72554493927397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600676800, while the sum is 76.

The spelling of 72554493927397 in words is "seventy-two trillion, five hundred fifty-four billion, four hundred ninety-three million, nine hundred twenty-seven thousand, three hundred ninety-seven".