2561767425 has 96 divisors (see below), whose sum is σ = 5394575360. Its totient is φ = 1167566400.

The previous prime is 2561767423. The next prime is 2561767447. The reversal of 2561767425 is 5247671652.

2561767425 is a `hidden beast` number, since 2 + 5 + 617 + 6 + 7 + 4 + 25 = 666.

It is not a de Polignac number, because 2561767425 - 2¹ = 2561767423 is a prime.

It is a super-2 number, since 2×2561767425² = 13125304679582261250, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2561767423) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2187090 + ... + 2188260.

Almost surely, 2^2561767425 is an apocalyptic number.

2561767425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561767425 is an abundant number, since it is smaller than the sum of its proper divisors (2832807935).

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

2561767425 is a wasteful number, since it uses less digits than its factorization.

2561767425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1649 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 2561767425 is about 50613.9054509727. The cubic root of 2561767425 is about 1368.2955030687.

The spelling of 2561767425 in words is "two billion, five hundred sixty-one million, seven hundred sixty-seven thousand, four hundred twenty-five".