154490691331 has 2 divisors, whose sum is σ = 154490691332. Its totient is φ = 154490691330.

The previous prime is 154490691269. The next prime is 154490691347. The reversal of 154490691331 is 133196094451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154490691331 is a prime.

It is a super-2 number, since 2×154490691331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (154490691031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77245345665 + 77245345666.

It is an arithmetic number, because the mean of its divisors is an integer number (77245345666).

Almost surely, 2^154490691331 is an apocalyptic number.

154490691331 is a deficient number, since it is larger than the sum of its proper divisors (1).

154490691331 is an equidigital number, since it uses as much as digits as its factorization.

154490691331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 154490691331 in words is "one hundred fifty-four billion, four hundred ninety million, six hundred ninety-one thousand, three hundred thirty-one".