61747325778 has 32 divisors (see below), whose sum is σ = 131245194240. Its totient is φ = 19299687680.

The previous prime is 61747325771. The next prime is 61747325819. The reversal of 61747325778 is 87752374716.

61747325778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61747325771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1097778 + ... + 1152653.

It is an arithmetic number, because the mean of its divisors is an integer number (4101412320).

Almost surely, 2^61747325778 is an apocalyptic number.

61747325778 is an abundant number, since it is smaller than the sum of its proper divisors (69497868462).

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

61747325778 is a wasteful number, since it uses less digits than its factorization.

61747325778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250722.

The product of its digits is 13829760, while the sum is 57.

The spelling of 61747325778 in words is "sixty-one billion, seven hundred forty-seven million, three hundred twenty-five thousand, seven hundred seventy-eight".