61169540000 has 120 divisors (see below), whose sum is σ = 154158706548. Its totient is φ = 23870720000.

The previous prime is 61169539997. The next prime is 61169540011. The reversal of 61169540000 is 4596116.

It can be written as a sum of positive squares in 10 ways, for example, as 5271340816 + 55898199184 = 72604^2 + 236428^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 782702 + ... + 857298.

Almost surely, 2^61169540000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61169540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77079353274).

61169540000 is an abundant number, since it is smaller than the sum of its proper divisors (92989166548).

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

61169540000 is an equidigital number, since it uses as much as digits as its factorization.

61169540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74668 (or 74645 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 61169540000 in words is "sixty-one billion, one hundred sixty-nine million, five hundred forty thousand".