72154165511 has 2 divisors, whose sum is σ = 72154165512. Its totient is φ = 72154165510.

The previous prime is 72154165477. The next prime is 72154165561. The reversal of 72154165511 is 11556145127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72154165511 - 2¹⁴ = 72154149127 is a prime.

It is a super-2 number, since 2×72154165511² (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 (72154165561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36077082755 + 36077082756.

It is an arithmetic number, because the mean of its divisors is an integer number (36077082756).

Almost surely, 2^72154165511 is an apocalyptic number.

72154165511 is a deficient number, since it is larger than the sum of its proper divisors (1).

72154165511 is an equidigital number, since it uses as much as digits as its factorization.

72154165511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 38.

The spelling of 72154165511 in words is "seventy-two billion, one hundred fifty-four million, one hundred sixty-five thousand, five hundred eleven".