154794653581 has 2 divisors, whose sum is σ = 154794653582. Its totient is φ = 154794653580.

The previous prime is 154794653527. The next prime is 154794653591. The reversal of 154794653581 is 185356497451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92516955556 + 62277698025 = 304166^2 + 249555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154794653581 is a prime.

It is a super-2 number, since 2×154794653581² (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 (154794653591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77397326790 + 77397326791.

It is an arithmetic number, because the mean of its divisors is an integer number (77397326791).

Almost surely, 2^154794653581 is an apocalyptic number.

It is an amenable number.

154794653581 is a deficient number, since it is larger than the sum of its proper divisors (1).

154794653581 is an equidigital number, since it uses as much as digits as its factorization.

154794653581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 58.

The spelling of 154794653581 in words is "one hundred fifty-four billion, seven hundred ninety-four million, six hundred fifty-three thousand, five hundred eighty-one".