25291542680 has 32 divisors (see below), whose sum is σ = 57220385040. Its totient is φ = 10060721280.

The previous prime is 25291542677. The next prime is 25291542709. The reversal of 25291542680 is 8624519252.

It is a super-2 number, since 2×25291542680² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1739414 + ... + 1753893.

Almost surely, 2^25291542680 is an apocalyptic number.

25291542680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25291542680 is an abundant number, since it is smaller than the sum of its proper divisors (31928842360).

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

25291542680 is a wasteful number, since it uses less digits than its factorization.

25291542680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493499 (or 3493495 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 25291542680 in words is "twenty-five billion, two hundred ninety-one million, five hundred forty-two thousand, six hundred eighty".