61783026169968 has 120 divisors (see below), whose sum is σ = 182038896421200. Its totient is φ = 19507011674112.

The previous prime is 61783026169961. The next prime is 61783026169979. The reversal of 61783026169968 is 86996162038716.

61783026169968 is a `hidden beast` number, since 6 + 1 + 78 + 302 + 6 + 169 + 96 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 61783026169896 and 61783026169905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61783026169961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13666768 + ... + 17616656.

It is an arithmetic number, because the mean of its divisors is an integer number (1516990803510).

Almost surely, 2^{61783026169968} 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 61783026169968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91019448210600).

61783026169968 is an abundant number, since it is smaller than the sum of its proper divisors (120255870251232).

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

61783026169968 is a wasteful number, since it uses less digits than its factorization.

61783026169968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955639 (or 3955630 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 61783026169968 in words is "sixty-one trillion, seven hundred eighty-three billion, twenty-six million, one hundred sixty-nine thousand, nine hundred sixty-eight".