25277780025 has 48 divisors (see below), whose sum is σ = 48880254400. Its totient is φ = 12771924480.

The previous prime is 25277779997. The next prime is 25277780069. The reversal of 25277780025 is 52008777252.

It is not a de Polignac number, because 25277780025 - 2¹⁰ = 25277779001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 972664 + ... + 998313.

Almost surely, 2^25277780025 is an apocalyptic number.

25277780025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25277780025 is a deficient number, since it is larger than the sum of its proper divisors (23602474375).

25277780025 is a wasteful number, since it uses less digits than its factorization.

25277780025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971015 (or 1971004 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 45.

The spelling of 25277780025 in words is "twenty-five billion, two hundred seventy-seven million, seven hundred eighty thousand, twenty-five".