25577612553 has 16 divisors (see below), whose sum is σ = 35688830976. Its totient is φ = 16263342480.

The previous prime is 25577612549. The next prime is 25577612561. The reversal of 25577612553 is 35521677552.

It is not a de Polignac number, because 25577612553 - 2² = 25577612549 is a prime.

It is a super-2 number, since 2×25577612553² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25577212553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510193 + ... + 558078.

It is an arithmetic number, because the mean of its divisors is an integer number (2230551936).

Almost surely, 2^25577612553 is an apocalyptic number.

25577612553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

25577612553 is a deficient number, since it is larger than the sum of its proper divisors (10111218423).

25577612553 is a wasteful number, since it uses less digits than its factorization.

25577612553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068644.

The product of its digits is 2205000, while the sum is 48.

The spelling of 25577612553 in words is "twenty-five billion, five hundred seventy-seven million, six hundred twelve thousand, five hundred fifty-three".