25492798771 has 4 divisors (see below), whose sum is σ = 27810325944. Its totient is φ = 23175271600.

The previous prime is 25492798729. The next prime is 25492798777. The reversal of 25492798771 is 17789729452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25492798771 - 2¹³ = 25492790579 is a prime.

It is a super-2 number, since 2×25492798771² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25492798777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158763570 + ... + 1158763591.

It is an arithmetic number, because the mean of its divisors is an integer number (6952581486).

Almost surely, 2^25492798771 is an apocalyptic number.

25492798771 is a deficient number, since it is larger than the sum of its proper divisors (2317527173).

25492798771 is a wasteful number, since it uses less digits than its factorization.

25492798771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317527172.

The product of its digits is 17781120, while the sum is 61.

The spelling of 25492798771 in words is "twenty-five billion, four hundred ninety-two million, seven hundred ninety-eight thousand, seven hundred seventy-one".