61917039360 has 576 divisors, whose sum is σ = 240978769920. Its totient is φ = 14929920000.

The previous prime is 61917039343. The next prime is 61917039419. The reversal of 61917039360 is 6393071916.

61917039360 is a `hidden beast` number, since 6 + 191 + 70 + 39 + 360 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103023060 + ... + 103023660.

It is an arithmetic number, because the mean of its divisors is an integer number (418365920).

Almost surely, 2^61917039360 is an apocalyptic number.

61917039360 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 61917039360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120489384960).

61917039360 is an abundant number, since it is smaller than the sum of its proper divisors (179061730560).

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

61917039360 is a wasteful number, since it uses less digits than its factorization.

61917039360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The spelling of 61917039360 in words is "sixty-one billion, nine hundred seventeen million, thirty-nine thousand, three hundred sixty".