61426681116822 has 168 divisors, whose sum is σ = 160772733021096. Its totient is φ = 17542692345024.

The previous prime is 61426681116821. The next prime is 61426681116833. The reversal of 61426681116822 is 22861118662416.

61426681116822 is a `hidden beast` number, since 6 + 1 + 426 + 6 + 81 + 116 + 8 + 22 = 666.

It is a super-2 number, since 2×61426681116822² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61426681116821) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 161769378 + ... + 162148650.

It is an arithmetic number, because the mean of its divisors is an integer number (956980553697).

Almost surely, 2^{61426681116822} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61426681116822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80386366510548).

61426681116822 is an abundant number, since it is smaller than the sum of its proper divisors (99346051904274).

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

61426681116822 is a wasteful number, since it uses less digits than its factorization.

61426681116822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381574 (or 381552 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 61426681116822 in words is "sixty-one trillion, four hundred twenty-six billion, six hundred eighty-one million, one hundred sixteen thousand, eight hundred twenty-two".