61356251034 has 128 divisors (see below), whose sum is σ = 149227142400. Its totient is φ = 18573753600.

The previous prime is 61356251009. The next prime is 61356251051. The reversal of 61356251034 is 43015265316.

61356251034 is a `hidden beast` number, since 6 + 13 + 5 + 625 + 10 + 3 + 4 = 666.

61356251034 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 61356251034.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11554372 + ... + 11559680.

It is an arithmetic number, because the mean of its divisors is an integer number (1165837050).

Almost surely, 2^61356251034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61356251034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74613571200).

61356251034 is an abundant number, since it is smaller than the sum of its proper divisors (87870891366).

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

61356251034 is a wasteful number, since it uses less digits than its factorization.

61356251034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597 (or 5591 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 61356251034 in words is "sixty-one billion, three hundred fifty-six million, two hundred fifty-one thousand, thirty-four".