61485994120 has 64 divisors (see below), whose sum is σ = 142125762240. Its totient is φ = 23926560000.

The previous prime is 61485994109. The next prime is 61485994123. The reversal of 61485994120 is 2149958416.

It is not an unprimeable number, because it can be changed into a prime (61485994123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360510 + ... + 502930.

It is an arithmetic number, because the mean of its divisors is an integer number (2220715035).

Almost surely, 2^61485994120 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 61485994120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71062881120).

61485994120 is an abundant number, since it is smaller than the sum of its proper divisors (80639768120).

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

61485994120 is a wasteful number, since it uses less digits than its factorization.

61485994120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142726 (or 142722 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 61485994120 in words is "sixty-one billion, four hundred eighty-five million, nine hundred ninety-four thousand, one hundred twenty".