1555413725 has 12 divisors (see below), whose sum is σ = 2042167284. Its totient is φ = 1171134720.

The previous prime is 1555413649. The next prime is 1555413731. The reversal of 1555413725 is 5273145551.

It can be written as a sum of positive squares in 6 ways, for example, as 6046681 + 1549367044 = 2459^2 + 39362^2 .

It is not a de Polignac number, because 1555413725 - 2⁸ = 1555413469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1829474 + ... + 1830323.

It is an arithmetic number, because the mean of its divisors is an integer number (170180607).

Almost surely, 2^1555413725 is an apocalyptic number.

It is an amenable number.

1555413725 is a deficient number, since it is larger than the sum of its proper divisors (486753559).

1555413725 is a wasteful number, since it uses less digits than its factorization.

1555413725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3659824 (or 3659819 counting only the distinct ones).

The product of its digits is 105000, while the sum is 38.

The square root of 1555413725 is about 39438.7338158821. The cubic root of 1555413725 is about 1158.6403324544.

The spelling of 1555413725 in words is "one billion, five hundred fifty-five million, four hundred thirteen thousand, seven hundred twenty-five".