1516021696 has 56 divisors (see below), whose sum is σ = 3451083776. Its totient is φ = 647274240.

The previous prime is 1516021691. The next prime is 1516021711. The reversal of 1516021696 is 6961206151.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1516021691) 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, 115165 + ... + 127651.

It is an arithmetic number, because the mean of its divisors is an integer number (61626496).

Almost surely, 2^1516021696 is an apocalyptic number.

1516021696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1516021696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1725541888).

1516021696 is an abundant number, since it is smaller than the sum of its proper divisors (1935062080).

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

1516021696 is a wasteful number, since it uses less digits than its factorization.

1516021696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12777 (or 12767 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 1516021696 is about 38936.1232790323. The cubic root of 1516021696 is about 1148.7754314622.

It can be divided in two parts, 15160 and 21696, that added together give a triangular number (36856 = T₂₇₁).

The spelling of 1516021696 in words is "one billion, five hundred sixteen million, twenty-one thousand, six hundred ninety-six".