681495338433 has 128 divisors (see below), whose sum is σ = 1184246784000. Its totient is φ = 338523494400.

The previous prime is 681495338423. The next prime is 681495338441. The reversal of 681495338433 is 334833594186.

681495338433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681495338433 - 2⁴ = 681495338417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681495338423) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1137721468 + ... + 1137722066.

It is an arithmetic number, because the mean of its divisors is an integer number (9251928000).

Almost surely, 2^681495338433 is an apocalyptic number.

It is an amenable number.

681495338433 is a deficient number, since it is larger than the sum of its proper divisors (502751445567).

681495338433 is a wasteful number, since it uses less digits than its factorization.

681495338433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583.

The product of its digits is 22394880, while the sum is 57.

The spelling of 681495338433 in words is "six hundred eighty-one billion, four hundred ninety-five million, three hundred thirty-eight thousand, four hundred thirty-three".