515005023540 has 96 divisors (see below), whose sum is σ = 1662600441600. Its totient is φ = 116673693696.

The previous prime is 515005023529. The next prime is 515005023557. The reversal of 515005023540 is 45320500515.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 515005023498 and 515005023507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5378215 + ... + 5473134.

It is an arithmetic number, because the mean of its divisors is an integer number (17318754600).

Almost surely, 2^515005023540 is an apocalyptic number.

It is an amenable number.

515005023540 is an abundant number, since it is smaller than the sum of its proper divisors (1147595418060).

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

515005023540 is a wasteful number, since it uses less digits than its factorization.

515005023540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10851481 (or 10851479 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 515005023540 in words is "five hundred fifteen billion, five million, twenty-three thousand, five hundred forty".