61516652525 has 6 divisors (see below), whose sum is σ = 76280649162. Its totient is φ = 49213322000.

The previous prime is 61516652497. The next prime is 61516652567. The reversal of 61516652525 is 52525661516.

It can be written as a sum of positive squares in 3 ways, for example, as 13064718601 + 48451933924 = 114301^2 + 220118^2 .

It is not a de Polignac number, because 61516652525 - 2⁸ = 61516652269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1230333026 + ... + 1230333075.

It is an arithmetic number, because the mean of its divisors is an integer number (12713441527).

Almost surely, 2^61516652525 is an apocalyptic number.

It is an amenable number.

61516652525 is a deficient number, since it is larger than the sum of its proper divisors (14763996637).

61516652525 is a wasteful number, since it uses less digits than its factorization.

61516652525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2460666111 (or 2460666106 counting only the distinct ones).

The product of its digits is 540000, while the sum is 44.

The spelling of 61516652525 in words is "sixty-one billion, five hundred sixteen million, six hundred fifty-two thousand, five hundred twenty-five".