1631716725 has 12 divisors (see below), whose sum is σ = 2697771776. Its totient is φ = 870248880.

The previous prime is 1631716703. The next prime is 1631716733. The reversal of 1631716725 is 5276171361.

It is not a de Polignac number, because 1631716725 - 2⁸ = 1631716469 is a prime.

It is a super-3 number, since 3×1631716725³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon 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, 10878037 + ... + 10878186.

Almost surely, 2^1631716725 is an apocalyptic number.

1631716725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1631716725 is a deficient number, since it is larger than the sum of its proper divisors (1066055051).

1631716725 is a wasteful number, since it uses less digits than its factorization.

1631716725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21756236 (or 21756231 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 1631716725 is about 40394.5135507286. The cubic root of 1631716725 is about 1177.2849396047.

The spelling of 1631716725 in words is "one billion, six hundred thirty-one million, seven hundred sixteen thousand, seven hundred twenty-five".