611541978 has 32 divisors (see below), whose sum is σ = 1259375040. Its totient is φ = 197850240.

The previous prime is 611541977. The next prime is 611541989. The reversal of 611541978 is 879145116.

It is not an unprimeable number, because it can be changed into a prime (611541977) 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, 42153 + ... + 54771.

It is an arithmetic number, because the mean of its divisors is an integer number (39355470).

Almost surely, 2^611541978 is an apocalyptic number.

611541978 is an abundant number, since it is smaller than the sum of its proper divisors (647833062).

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

611541978 is a wasteful number, since it uses less digits than its factorization.

611541978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12862.

The product of its digits is 60480, while the sum is 42.

The square root of 611541978 is about 24729.3748000227. The cubic root of 611541978 is about 848.8066196540.

The spelling of 611541978 in words is "six hundred eleven million, five hundred forty-one thousand, nine hundred seventy-eight".