25734503540 has 12 divisors (see below), whose sum is σ = 54042457476. Its totient is φ = 10293801408.

The previous prime is 25734503537. The next prime is 25734503549. The reversal of 25734503540 is 4530543752.

It can be written as a sum of positive squares in 2 ways, for example, as 10569073636 + 15165429904 = 102806^2 + 123148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25734503494 and 25734503503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25734503549) 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, 643362569 + ... + 643362608.

It is an arithmetic number, because the mean of its divisors is an integer number (4503538123).

Almost surely, 2^25734503540 is an apocalyptic number.

25734503540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25734503540 is an abundant number, since it is smaller than the sum of its proper divisors (28307953936).

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

25734503540 is a wasteful number, since it uses less digits than its factorization.

25734503540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286725186 (or 1286725184 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 38.

The spelling of 25734503540 in words is "twenty-five billion, seven hundred thirty-four million, five hundred three thousand, five hundred forty".