61885658828784 has 80 divisors (see below), whose sum is σ = 182712011040000. Its totient is φ = 17681426096640.

The previous prime is 61885658828759. The next prime is 61885658828801. The reversal of 61885658828784 is 48782885658816.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a junction number, because it is equal to n+sod(n) for n = 61885658828697 and 61885658828706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31815124 + ... + 33704204.

It is an arithmetic number, because the mean of its divisors is an integer number (2283900138000).

Almost surely, 2^{61885658828784} is an apocalyptic number.

It is an amenable number.

61885658828784 is an abundant number, since it is smaller than the sum of its proper divisors (120826352211216).

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

61885658828784 is a wasteful number, since it uses less digits than its factorization.

61885658828784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986598 (or 1986592 counting only the distinct ones).

The product of its digits is 13212057600, while the sum is 84.

The spelling of 61885658828784 in words is "sixty-one trillion, eight hundred eighty-five billion, six hundred fifty-eight million, eight hundred twenty-eight thousand, seven hundred eighty-four".