25534761616 has 135 divisors (see below), whose sum is σ = 62460734121. Its totient is φ = 10078653312.

The previous prime is 25534761587. The next prime is 25534761661. The reversal of 25534761616 is 61616743552.

The square root of 25534761616 is 159796.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3777331600 + 21757430016 = 61460^2 + 147504^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 58165525 + ... + 58165963.

Almost surely, 2^25534761616 is an apocalyptic number.

25534761616 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25534761616 is the 159796-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25534761616

25534761616 is an abundant number, since it is smaller than the sum of its proper divisors (36925972505).

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

25534761616 is an equidigital number, since it uses as much as digits as its factorization.

25534761616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 461 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

The spelling of 25534761616 in words is "twenty-five billion, five hundred thirty-four million, seven hundred sixty-one thousand, six hundred sixteen".