61308910080 has 240 divisors, whose sum is σ = 231633683424. Its totient is φ = 14862704640.

The previous prime is 61308910073. The next prime is 61308910081. The reversal of 61308910080 is 8001980316.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61308910081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132487 + ... + 374393.

Almost surely, 2^61308910080 is an apocalyptic number.

61308910080 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 61308910080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115816841712).

61308910080 is an abundant number, since it is smaller than the sum of its proper divisors (170324773344).

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

61308910080 is a wasteful number, since it uses less digits than its factorization.

61308910080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241947 (or 241928 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 61308910080 in words is "sixty-one billion, three hundred eight million, nine hundred ten thousand, eighty".