611949980 has 24 divisors (see below), whose sum is σ = 1296889440. Its totient is φ = 242533440.

The previous prime is 611949971. The next prime is 611949991. The reversal of 611949980 is 89949116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138176 + ... + 142535.

It is an arithmetic number, because the mean of its divisors is an integer number (54037060).

Almost surely, 2^611949980 is an apocalyptic number.

It is an amenable number.

611949980 is an abundant number, since it is smaller than the sum of its proper divisors (684939460).

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

611949980 is a wasteful number, since it uses less digits than its factorization.

611949980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280829 (or 280827 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 611949980 is about 24737.6227637176. The cubic root of 611949980 is about 848.9953435806.

The spelling of 611949980 in words is "six hundred eleven million, nine hundred forty-nine thousand, nine hundred eighty".