1611812980 has 24 divisors (see below), whose sum is σ = 3386009088. Its totient is φ = 644496288.

The previous prime is 1611812957. The next prime is 1611813001. The reversal of 1611812980 is 892181161.

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, 50617 + ... + 76063.

It is an arithmetic number, because the mean of its divisors is an integer number (141083712).

Almost surely, 2^1611812980 is an apocalyptic number.

1611812980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1611812980 is an abundant number, since it is smaller than the sum of its proper divisors (1774196108).

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

1611812980 is a wasteful number, since it uses less digits than its factorization.

1611812980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28623 (or 28621 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 37.

The square root of 1611812980 is about 40147.3906997703. The cubic root of 1611812980 is about 1172.4784871554.

The spelling of 1611812980 in words is "one billion, six hundred eleven million, eight hundred twelve thousand, nine hundred eighty".