61021734774 has 192 divisors, whose sum is σ = 167514117120. Its totient is φ = 14566970880.

The previous prime is 61021734737. The next prime is 61021734791. The reversal of 61021734774 is 47743712016.

It is a happy number.

It is a super-2 number, since 2×61021734774² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10045002 + ... + 10051074.

It is an arithmetic number, because the mean of its divisors is an integer number (872469360).

Almost surely, 2^61021734774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61021734774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83757058560).

61021734774 is an abundant number, since it is smaller than the sum of its proper divisors (106492382346).

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

61021734774 is a wasteful number, since it uses less digits than its factorization.

61021734774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355 (or 6348 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 61021734774 in words is "sixty-one billion, twenty-one million, seven hundred thirty-four thousand, seven hundred seventy-four".