2515686540 has 48 divisors (see below), whose sum is σ = 7049887488. Its totient is φ = 670281664.

The previous prime is 2515686473. The next prime is 2515686541. The reversal of 2515686540 is 456865152.

It is a junction number, because it is equal to n+sod(n) for n = 2515686492 and 2515686501.

It is not an unprimeable number, because it can be changed into a prime (2515686541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56239 + ... + 90521.

It is an arithmetic number, because the mean of its divisors is an integer number (146872656).

Almost surely, 2^2515686540 is an apocalyptic number.

2515686540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2515686540 is an abundant number, since it is smaller than the sum of its proper divisors (4534200948).

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

2515686540 is a wasteful number, since it uses less digits than its factorization.

2515686540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35518 (or 35516 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 2515686540 is about 50156.6201014383. The cubic root of 2515686540 is about 1360.0415464528.

The spelling of 2515686540 in words is "two billion, five hundred fifteen million, six hundred eighty-six thousand, five hundred forty".