25431401055550 has 48 divisors (see below), whose sum is σ = 54063353866752. Its totient is φ = 8718779224800.

The previous prime is 25431401055523. The next prime is 25431401055559. The reversal of 25431401055550 is 5555010413452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431401055559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3166519 + ... + 7803181.

It is an arithmetic number, because the mean of its divisors is an integer number (1126319872224).

Almost surely, 2^{25431401055550} is an apocalyptic number.

25431401055550 is an abundant number, since it is smaller than the sum of its proper divisors (28631952811202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25431401055550 is a wasteful number, since it uses less digits than its factorization.

25431401055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652353 (or 4652348 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 40.

The spelling of 25431401055550 in words is "twenty-five trillion, four hundred thirty-one billion, four hundred one million, fifty-five thousand, five hundred fifty".