72541572811 has 2 divisors, whose sum is σ = 72541572812. Its totient is φ = 72541572810.

The previous prime is 72541572809. The next prime is 72541572833. The reversal of 72541572811 is 11827514527.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72541572811 - 2¹ = 72541572809 is a prime.

It is a super-2 number, since 2×72541572811² (a number of 23 digits) contains 22 as substring.

Together with 72541572809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72541572611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36270786405 + 36270786406.

It is an arithmetic number, because the mean of its divisors is an integer number (36270786406).

Almost surely, 2^72541572811 is an apocalyptic number.

72541572811 is a deficient number, since it is larger than the sum of its proper divisors (1).

72541572811 is an equidigital number, since it uses as much as digits as its factorization.

72541572811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 43.

The spelling of 72541572811 in words is "seventy-two billion, five hundred forty-one million, five hundred seventy-two thousand, eight hundred eleven".