61169655625 has 45 divisors (see below), whose sum is σ = 82878618009. Its totient is φ = 45112080000.

The previous prime is 61169655581. The next prime is 61169655641. The reversal of 61169655625 is 52655696116.

The square root of 61169655625 is 247325.

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

It can be written as a sum of positive squares in 22 ways, for example, as 1596561849 + 59573093776 = 39957^2 + 244076^2 .

It is not a de Polignac number, because 61169655625 - 2¹⁷ = 61169524553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 80380245 + ... + 80381005.

Almost surely, 2^61169655625 is an apocalyptic number.

61169655625 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61169655625 is the 247325-th square number.

61169655625 is the 123663-rd centered octagonal number.

It is an amenable number.

61169655625 is a deficient number, since it is larger than the sum of its proper divisors (21708962384).

61169655625 is an frugal number, since it uses more digits than its factorization.

61169655625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 779 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 52.

The spelling of 61169655625 in words is "sixty-one billion, one hundred sixty-nine million, six hundred fifty-five thousand, six hundred twenty-five".