681475742515 has 16 divisors (see below), whose sum is σ = 846018276480. Its totient is φ = 526351154560.

The previous prime is 681475742509. The next prime is 681475742527. The reversal of 681475742515 is 515247574186.

It is a de Polignac number, because none of the positive numbers 2^k-681475742515 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2600550 + ... + 2850580.

It is an arithmetic number, because the mean of its divisors is an integer number (52876142280).

Almost surely, 2^681475742515 is an apocalyptic number.

681475742515 is a deficient number, since it is larger than the sum of its proper divisors (164542533965).

681475742515 is a wasteful number, since it uses less digits than its factorization.

681475742515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268862.

The product of its digits is 9408000, while the sum is 55.

The spelling of 681475742515 in words is "six hundred eighty-one billion, four hundred seventy-five million, seven hundred forty-two thousand, five hundred fifteen".