23401555544 has 8 divisors (see below), whose sum is σ = 43877916660. Its totient is φ = 11700777768.

The previous prime is 23401555543. The next prime is 23401555549. The reversal of 23401555544 is 44555510432.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 23401555498 and 23401555507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23401555543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1462597214 + ... + 1462597229.

Almost surely, 2^23401555544 is an apocalyptic number.

It is an amenable number.

23401555544 is a deficient number, since it is larger than the sum of its proper divisors (20476361116).

23401555544 is a wasteful number, since it uses less digits than its factorization.

23401555544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925194449 (or 2925194445 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 23401555544 in words is "twenty-three billion, four hundred one million, five hundred fifty-five thousand, five hundred forty-four".