61914618240 has 256 divisors, whose sum is σ = 203677467840. Its totient is φ = 15987507200.

The previous prime is 61914618217. The next prime is 61914618253. The reversal of 61914618240 is 4281641916.

It is a junction number, because it is equal to n+sod(n) for n = 61914618192 and 61914618201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10781770 + ... + 10787510.

Almost surely, 2^61914618240 is an apocalyptic number.

61914618240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61914618240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101838733920).

61914618240 is an abundant number, since it is smaller than the sum of its proper divisors (141762849600).

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

61914618240 is a wasteful number, since it uses less digits than its factorization.

61914618240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941 (or 5929 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 61914618240 in words is "sixty-one billion, nine hundred fourteen million, six hundred eighteen thousand, two hundred forty".