23401555725 has 12 divisors (see below), whose sum is σ = 38690572256. Its totient is φ = 12480829680.

The previous prime is 23401555699. The next prime is 23401555741. The reversal of 23401555725 is 52755510432.

It is not a de Polignac number, because 23401555725 - 2⁵ = 23401555693 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, 156010297 + ... + 156010446.

Almost surely, 2^23401555725 is an apocalyptic number.

23401555725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23401555725 is a deficient number, since it is larger than the sum of its proper divisors (15289016531).

23401555725 is a wasteful number, since it uses less digits than its factorization.

23401555725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312020756 (or 312020751 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 39.

The spelling of 23401555725 in words is "twenty-three billion, four hundred one million, five hundred fifty-five thousand, seven hundred twenty-five".