42639022797 has 16 divisors (see below), whose sum is σ = 66356170752. Its totient is φ = 23846747760.

The previous prime is 42639022793. The next prime is 42639022823. The reversal of 42639022797 is 79722093624.

It is not a de Polignac number, because 42639022797 - 2² = 42639022793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42639022793) 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, 21599329 + ... + 21601302.

It is an arithmetic number, because the mean of its divisors is an integer number (4147260672).

Almost surely, 2^42639022797 is an apocalyptic number.

42639022797 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42639022797 is a deficient number, since it is larger than the sum of its proper divisors (23717147955).

42639022797 is a wasteful number, since it uses less digits than its factorization.

42639022797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43200688.

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 42639022797 in words is "forty-two billion, six hundred thirty-nine million, twenty-two thousand, seven hundred ninety-seven".