611348778 has 24 divisors (see below), whose sum is σ = 1332721728. Its totient is φ = 202531752.

The previous prime is 611348753. The next prime is 611348839. The reversal of 611348778 is 877843116.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101250 + ... + 107117.

It is an arithmetic number, because the mean of its divisors is an integer number (55530072).

Almost surely, 2^611348778 is an apocalyptic number.

611348778 is an abundant number, since it is smaller than the sum of its proper divisors (721372950).

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

611348778 is a wasteful number, since it uses less digits than its factorization.

611348778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208538 (or 208535 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 611348778 is about 24725.4682058803. The cubic root of 611348778 is about 848.7172244764.

The spelling of 611348778 in words is "six hundred eleven million, three hundred forty-eight thousand, seven hundred seventy-eight".