61028908974 has 128 divisors (see below), whose sum is σ = 157163535360. Its totient is φ = 17348889600.

The previous prime is 61028908951. The next prime is 61028908987. The reversal of 61028908974 is 47980982016.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61028908974.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3130762 + ... + 3150194.

It is an arithmetic number, because the mean of its divisors is an integer number (1227840120).

Almost surely, 2^61028908974 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61028908974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78581767680).

61028908974 is an abundant number, since it is smaller than the sum of its proper divisors (96134626386).

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

61028908974 is a wasteful number, since it uses less digits than its factorization.

61028908974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19783 (or 19777 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 61028908974 in words is "sixty-one billion, twenty-eight million, nine hundred eight thousand, nine hundred seventy-four".