1513706640 has 80 divisors (see below), whose sum is σ = 4801651008. Its totient is φ = 394265088.

The previous prime is 1513706633. The next prime is 1513706641. The reversal of 1513706640 is 466073151.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1513706641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63019 + ... + 83658.

Almost surely, 2^1513706640 is an apocalyptic number.

1513706640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1513706640 is an abundant number, since it is smaller than the sum of its proper divisors (3287944368).

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

1513706640 is a wasteful number, since it uses less digits than its factorization.

1513706640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146736 (or 146730 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1513706640 is about 38906.3830238690. The cubic root of 1513706640 is about 1148.1903839131.

Adding to 1513706640 its reverse (466073151), we get a palindrome (1979779791).

The spelling of 1513706640 in words is "one billion, five hundred thirteen million, seven hundred six thousand, six hundred forty".