25354349660 has 24 divisors (see below), whose sum is σ = 54146579760. Its totient is φ = 9969845504.

The previous prime is 25354349597. The next prime is 25354349663. The reversal of 25354349660 is 6694345352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25354349663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10742189 + ... + 10744548.

It is an arithmetic number, because the mean of its divisors is an integer number (2256107490).

Almost surely, 2^25354349660 is an apocalyptic number.

25354349660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25354349660 is an abundant number, since it is smaller than the sum of its proper divisors (28792230100).

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

25354349660 is a wasteful number, since it uses less digits than its factorization.

25354349660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21486805 (or 21486803 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 25354349660 in words is "twenty-five billion, three hundred fifty-four million, three hundred forty-nine thousand, six hundred sixty".