1616782980 has 24 divisors (see below), whose sum is σ = 4526992512. Its totient is φ = 431142112.

The previous prime is 1616782957. The next prime is 1616783009. The reversal of 1616782980 is 892876161.

It is a super-2 number, since 2×1616782980² = 5227974408835360800, which contains 22 as substring.

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, 13473132 + ... + 13473251.

It is an arithmetic number, because the mean of its divisors is an integer number (188624688).

Almost surely, 2^1616782980 is an apocalyptic number.

1616782980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616782980 is an abundant number, since it is smaller than the sum of its proper divisors (2910209532).

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

1616782980 is a wasteful number, since it uses less digits than its factorization.

1616782980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26946395 (or 26946393 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 1616782980 is about 40209.2399828696. The cubic root of 1616782980 is about 1173.6823569620.

The spelling of 1616782980 in words is "one billion, six hundred sixteen million, seven hundred eighty-two thousand, nine hundred eighty".