72157297411 has 2 divisors, whose sum is σ = 72157297412. Its totient is φ = 72157297410.

The previous prime is 72157297361. The next prime is 72157297427. The reversal of 72157297411 is 11479275127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72157297411 - 2¹¹ = 72157295363 is a prime.

It is not a weakly prime, because it can be changed into another prime (72157294411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36078648705 + 36078648706.

It is an arithmetic number, because the mean of its divisors is an integer number (36078648706).

Almost surely, 2^72157297411 is an apocalyptic number.

72157297411 is a deficient number, since it is larger than the sum of its proper divisors (1).

72157297411 is an equidigital number, since it uses as much as digits as its factorization.

72157297411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 46.

The spelling of 72157297411 in words is "seventy-two billion, one hundred fifty-seven million, two hundred ninety-seven thousand, four hundred eleven".