42709634653 has 6 divisors (see below), whose sum is σ = 49682636286. Its totient is φ = 36608258232.

The previous prime is 42709634647. The next prime is 42709634663. The reversal of 42709634653 is 35643690724.

It can be written as a sum of positive squares in only one way, i.e., 41533624804 + 1176009849 = 203798^2 + 34293^2 .

It is not a de Polignac number, because 42709634653 - 2⁹ = 42709634141 is a prime.

It is a super-2 number, since 2×42709634653² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 871625197 = 42709634653 / (4 + 2 + 7 + 0 + 9 + 6 + 3 + 4 + 6 + 5 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42709634597 and 42709634606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42709634623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435812550 + ... + 435812647.

It is an arithmetic number, because the mean of its divisors is an integer number (8280439381).

Almost surely, 2^42709634653 is an apocalyptic number.

It is an amenable number.

42709634653 is a deficient number, since it is larger than the sum of its proper divisors (6973001633).

42709634653 is an equidigital number, since it uses as much as digits as its factorization.

42709634653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871625211 (or 871625204 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 42709634653 in words is "forty-two billion, seven hundred nine million, six hundred thirty-four thousand, six hundred fifty-three".