681547022745 has 16 divisors (see below), whose sum is σ = 1095000035712. Its totient is φ = 361983479040.

The previous prime is 681547022743. The next prime is 681547022753. The reversal of 681547022745 is 547220745186.

It is not a de Polignac number, because 681547022745 - 2¹ = 681547022743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681547022743) 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, 94262917 + ... + 94270146.

It is an arithmetic number, because the mean of its divisors is an integer number (68437502232).

Almost surely, 2^681547022745 is an apocalyptic number.

It is an amenable number.

681547022745 is a deficient number, since it is larger than the sum of its proper divisors (413453012967).

681547022745 is a wasteful number, since it uses less digits than its factorization.

681547022745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188533312.

The product of its (nonzero) digits is 3763200, while the sum is 51.

The spelling of 681547022745 in words is "six hundred eighty-one billion, five hundred forty-seven million, twenty-two thousand, seven hundred forty-five".