25720950554 has 32 divisors (see below), whose sum is σ = 43686808704. Its totient is φ = 11268354240.

The previous prime is 25720950551. The next prime is 25720950557. The reversal of 25720950554 is 45505902752.

It is an interprime number because it is at equal distance from previous prime (25720950551) and next prime (25720950557).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25720950551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85829 + ... + 242504.

It is an arithmetic number, because the mean of its divisors is an integer number (1365212772).

Almost surely, 2^25720950554 is an apocalyptic number.

25720950554 is a deficient number, since it is larger than the sum of its proper divisors (17965858150).

25720950554 is a wasteful number, since it uses less digits than its factorization.

25720950554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328502.

The product of its (nonzero) digits is 630000, while the sum is 44.

The spelling of 25720950554 in words is "twenty-five billion, seven hundred twenty million, nine hundred fifty thousand, five hundred fifty-four".