1516661020 has 24 divisors (see below), whose sum is σ = 3639986784. Its totient is φ = 519998016.

The previous prime is 1516661011. The next prime is 1516661023. The reversal of 1516661020 is 201666151.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1516661020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516661023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5416507 + ... + 5416786.

It is an arithmetic number, because the mean of its divisors is an integer number (151666116).

Almost surely, 2^1516661020 is an apocalyptic number.

1516661020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1516661020 is an abundant number, since it is smaller than the sum of its proper divisors (2123325764).

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

1516661020 is a wasteful number, since it uses less digits than its factorization.

1516661020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10833309 (or 10833307 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1516661020 is about 38944.3323219182. The cubic root of 1516661020 is about 1148.9368927591.

The spelling of 1516661020 in words is "one billion, five hundred sixteen million, six hundred sixty-one thousand, twenty".