25734772780 has 12 divisors (see below), whose sum is σ = 54043022880. Its totient is φ = 10293909104.

The previous prime is 25734772733. The next prime is 25734772787. The reversal of 25734772780 is 8727743752.

It is not an unprimeable number, because it can be changed into a prime (25734772787) 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, 643369300 + ... + 643369339.

It is an arithmetic number, because the mean of its divisors is an integer number (4503585240).

Almost surely, 2^25734772780 is an apocalyptic number.

25734772780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25734772780 is an abundant number, since it is smaller than the sum of its proper divisors (28308250100).

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

25734772780 is a wasteful number, since it uses less digits than its factorization.

25734772780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286738648 (or 1286738646 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 52.

The spelling of 25734772780 in words is "twenty-five billion, seven hundred thirty-four million, seven hundred seventy-two thousand, seven hundred eighty".