61485494878080 has 4800 divisors, whose sum is σ = 288479252001600. Its totient is φ = 12462374486016.

The previous prime is 61485494878063. The next prime is 61485494878139. The reversal of 61485494878080 is 8087849458416.

It is a happy number.

61485494878080 is a `hidden beast` number, since 6 + 1 + 4 + 8 + 549 + 4 + 8 + 78 + 0 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 599 ways as a sum of consecutive naturals, for example, 778297403481 + ... + 778297403559.

It is an arithmetic number, because the mean of its divisors is an integer number (60099844167).

Almost surely, 2^{61485494878080} is an apocalyptic number.

61485494878080 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 61485494878080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144239626000800).

61485494878080 is an abundant number, since it is smaller than the sum of its proper divisors (226993757123520).

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

61485494878080 is an equidigital number, since it uses as much as digits as its factorization.

61485494878080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 495452160, while the sum is 72.

The spelling of 61485494878080 in words is "sixty-one trillion, four hundred eighty-five billion, four hundred ninety-four million, eight hundred seventy-eight thousand, eighty".