155716745425 has 6 divisors (see below), whose sum is σ = 193088764358. Its totient is φ = 124573396320.

The previous prime is 155716745411. The next prime is 155716745447. The reversal of 155716745425 is 524547617551.

It can be written as a sum of positive squares in 3 ways, for example, as 18740514816 + 136976230609 = 136896^2 + 370103^2 .

It is not a de Polignac number, because 155716745425 - 2⁷ = 155716745297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3114334884 + ... + 3114334933.

Almost surely, 2^155716745425 is an apocalyptic number.

It is an amenable number.

155716745425 is a deficient number, since it is larger than the sum of its proper divisors (37372018933).

155716745425 is an equidigital number, since it uses as much as digits as its factorization.

155716745425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6228669827 (or 6228669822 counting only the distinct ones).

The product of its digits is 5880000, while the sum is 52.

The spelling of 155716745425 in words is "one hundred fifty-five billion, seven hundred sixteen million, seven hundred forty-five thousand, four hundred twenty-five".