154775868401025 has 81 divisors (see below), whose sum is σ = 281442892257891. Its totient is φ = 81308514307680.

The previous prime is 154775868401003. The next prime is 154775868401039. The reversal of 154775868401025 is 520104868577451.

The square root of 154775868401025 is 12440895.

It is a perfect power (a square), and thus also a powerful number.

154775868401025 is a `hidden beast` number, since 1 + 5 + 4 + 7 + 7 + 586 + 8 + 40 + 1 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55719312624369 + 99056555776656 = 7464537^2 + 9952716^2 .

It is a de Polignac number, because none of the positive numbers 2^k-154775868401025 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 12503093286 + ... + 12503105664.

Almost surely, 2^{154775868401025} is an apocalyptic number.

154775868401025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

154775868401025 is the 12440895-th square number.

154775868401025 is the 6220448-th centered octagonal number.

It is an amenable number.

154775868401025 is a deficient number, since it is larger than the sum of its proper divisors (126667023856866).

154775868401025 is an frugal number, since it uses more digits than its factorization.

154775868401025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24908 (or 12454 counting only the distinct ones).

The product of its (nonzero) digits is 75264000, while the sum is 63.

The spelling of 154775868401025 in words is "one hundred fifty-four trillion, seven hundred seventy-five billion, eight hundred sixty-eight million, four hundred one thousand, twenty-five".