61650563771776 has 256 divisors, whose sum is σ = 148375757376000. Its totient is φ = 24925684580352.

The previous prime is 61650563771707. The next prime is 61650563771843. The reversal of 61650563771776 is 67717736505616.

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, 5574690535 + ... + 5574701593.

It is an arithmetic number, because the mean of its divisors is an integer number (579592802250).

Almost surely, 2^{61650563771776} 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 61650563771776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74187878688000).

61650563771776 is an abundant number, since it is smaller than the sum of its proper divisors (86725193604224).

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

61650563771776 is a wasteful number, since it uses less digits than its factorization.

61650563771776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12449 (or 12437 counting only the distinct ones).

The product of its (nonzero) digits is 233377200, while the sum is 67.

The spelling of 61650563771776 in words is "sixty-one trillion, six hundred fifty billion, five hundred sixty-three million, seven hundred seventy-one thousand, seven hundred seventy-six".