25566792654 has 128 divisors (see below), whose sum is σ = 58859458560. Its totient is φ = 7338553344.

The previous prime is 25566792649. The next prime is 25566792659. The reversal of 25566792654 is 45629766552.

It is an interprime number because it is at equal distance from previous prime (25566792649) and next prime (25566792659).

It is a super-2 number, since 2×25566792654² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25566792594 and 25566792603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25566792659) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42119619 + ... + 42120225.

It is an arithmetic number, because the mean of its divisors is an integer number (459839520).

Almost surely, 2^25566792654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25566792654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29429729280).

25566792654 is an abundant number, since it is smaller than the sum of its proper divisors (33292665906).

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

25566792654 is a wasteful number, since it uses less digits than its factorization.

25566792654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034.

The product of its digits is 27216000, while the sum is 57.

The spelling of 25566792654 in words is "twenty-five billion, five hundred sixty-six million, seven hundred ninety-two thousand, six hundred fifty-four".