25540452740 has 48 divisors (see below), whose sum is σ = 59057740224. Its totient is φ = 9200630400.

The previous prime is 25540452733. The next prime is 25540452757. The reversal of 25540452740 is 4725404552.

It is a junction number, because it is equal to n+sod(n) for n = 25540452694 and 25540452703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 518951 + ... + 566030.

It is an arithmetic number, because the mean of its divisors is an integer number (1230369588).

Almost surely, 2^25540452740 is an apocalyptic number.

25540452740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25540452740 is an abundant number, since it is smaller than the sum of its proper divisors (33517287484).

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

25540452740 is a wasteful number, since it uses less digits than its factorization.

25540452740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085108 (or 1085106 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 38.

The spelling of 25540452740 in words is "twenty-five billion, five hundred forty million, four hundred fifty-two thousand, seven hundred forty".