1516500640 has 48 divisors (see below), whose sum is σ = 3793488552. Its totient is φ = 570916864.

The previous prime is 1516500631. The next prime is 1516500647. The reversal of 1516500640 is 460056151.

It can be written as a sum of positive squares in 4 ways, for example, as 1099850896 + 416649744 = 33164^2 + 20412^2 .

It is a super-2 number, since 2×1516500640² = 4599548382240819200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1516500599 and 1516500608.

It is not an unprimeable number, because it can be changed into a prime (1516500647) 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, 276049 + ... + 281488.

Almost surely, 2^1516500640 is an apocalyptic number.

1516500640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1516500640 is an abundant number, since it is smaller than the sum of its proper divisors (2276987912).

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

1516500640 is a wasteful number, since it uses less digits than its factorization.

1516500640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557569 (or 557561 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1516500640 is about 38942.2731745336. The cubic root of 1516500640 is about 1148.8963930491.

Adding to 1516500640 its reverse (460056151), we get a palindrome (1976556791).

The spelling of 1516500640 in words is "one billion, five hundred sixteen million, five hundred thousand, six hundred forty".