61215608257760 has 192 divisors, whose sum is σ = 164741848911360. Its totient is φ = 21277771130880.

The previous prime is 61215608257723. The next prime is 61215608257823. The reversal of 61215608257760 is 6775280651216.

It is a junction number, because it is equal to n+sod(n) for n = 61215608257696 and 61215608257705.

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, 58542074 + ... + 59578566.

It is an arithmetic number, because the mean of its divisors is an integer number (858030463080).

Almost surely, 2^{61215608257760} 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 61215608257760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82370924455680).

61215608257760 is an abundant number, since it is smaller than the sum of its proper divisors (103526240653600).

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

61215608257760 is a wasteful number, since it uses less digits than its factorization.

61215608257760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038001 (or 1037993 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 56.

The spelling of 61215608257760 in words is "sixty-one trillion, two hundred fifteen billion, six hundred eight million, two hundred fifty-seven thousand, seven hundred sixty".