515680381520 has 40 divisors (see below), whose sum is σ = 1200261690240. Its totient is φ = 206047670400.

The previous prime is 515680381511. The next prime is 515680381523. The reversal of 515680381520 is 25183086515.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×515680381520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515680381523) 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, 3433556 + ... + 3580595.

It is an arithmetic number, because the mean of its divisors is an integer number (30006542256).

Almost surely, 2^515680381520 is an apocalyptic number.

It is an amenable number.

515680381520 is an abundant number, since it is smaller than the sum of its proper divisors (684581308720).

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

515680381520 is a wasteful number, since it uses less digits than its factorization.

515680381520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7015083 (or 7015077 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 515680381520 in words is "five hundred fifteen billion, six hundred eighty million, three hundred eighty-one thousand, five hundred twenty".