25545426426 has 48 divisors (see below), whose sum is σ = 60324185376. Its totient is φ = 7765424928.

The previous prime is 25545426409. The next prime is 25545426427. The reversal of 25545426426 is 62462454552.

25545426426 is a `hidden beast` number, since 2 + 5 + 545 + 42 + 64 + 2 + 6 = 666.

It is a super-2 number, since 2×25545426426² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25545426427) 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, 638220 + ... + 677063.

It is an arithmetic number, because the mean of its divisors is an integer number (1256753862).

Almost surely, 2^25545426426 is an apocalyptic number.

25545426426 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25545426426 is an abundant number, since it is smaller than the sum of its proper divisors (34778758950).

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

25545426426 is a wasteful number, since it uses less digits than its factorization.

25545426426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315387 (or 1315384 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 45.

The spelling of 25545426426 in words is "twenty-five billion, five hundred forty-five million, four hundred twenty-six thousand, four hundred twenty-six".