25180500520 has 64 divisors (see below), whose sum is σ = 65215785600. Its totient is φ = 8571191040.

The previous prime is 25180500493. The next prime is 25180500523. The reversal of 25180500520 is 2500508152.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (25180500523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284571 + ... + 362410.

It is an arithmetic number, because the mean of its divisors is an integer number (1018996650).

Almost surely, 2^25180500520 is an apocalyptic number.

25180500520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25180500520 is an abundant number, since it is smaller than the sum of its proper divisors (40035285080).

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

25180500520 is a wasteful number, since it uses less digits than its factorization.

25180500520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647138 (or 647134 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

The spelling of 25180500520 in words is "twenty-five billion, one hundred eighty million, five hundred thousand, five hundred twenty".