1625725517 has 8 divisors (see below), whose sum is σ = 1766845080. Its totient is φ = 1486900800.

The previous prime is 1625725501. The next prime is 1625725523. The reversal of 1625725517 is 7155275261.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 588499081 + 1037226436 = 24259^2 + 32206^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625725517 - 2⁴ = 1625725501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625725547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572234 + ... + 575067.

It is an arithmetic number, because the mean of its divisors is an integer number (220855635).

Almost surely, 2^1625725517 is an apocalyptic number.

It is an amenable number.

1625725517 is a deficient number, since it is larger than the sum of its proper divisors (141119563).

1625725517 is a wasteful number, since it uses less digits than its factorization.

1625725517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147423.

The product of its digits is 147000, while the sum is 41.

The square root of 1625725517 is about 40320.2866681277. The cubic root of 1625725517 is about 1175.8422853443.

The spelling of 1625725517 in words is "one billion, six hundred twenty-five million, seven hundred twenty-five thousand, five hundred seventeen".