154697728631 has 2 divisors, whose sum is σ = 154697728632. Its totient is φ = 154697728630.

The previous prime is 154697728621. The next prime is 154697728643. The reversal of 154697728631 is 136827796451.

It is a weak prime.

It is an emirp because it is prime and its reverse (136827796451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154697728631 - 2²² = 154693534327 is a prime.

It is a super-2 number, since 2×154697728631² (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 (154697728621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77348864315 + 77348864316.

It is an arithmetic number, because the mean of its divisors is an integer number (77348864316).

Almost surely, 2^154697728631 is an apocalyptic number.

154697728631 is a deficient number, since it is larger than the sum of its proper divisors (1).

154697728631 is an equidigital number, since it uses as much as digits as its factorization.

154697728631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The spelling of 154697728631 in words is "one hundred fifty-four billion, six hundred ninety-seven million, seven hundred twenty-eight thousand, six hundred thirty-one".