42039691357 has 16 divisors (see below), whose sum is σ = 44905821552. Its totient is φ = 39218135040.

The previous prime is 42039691339. The next prime is 42039691429. The reversal of 42039691357 is 75319693024.

It can be written as a sum of positive squares in 8 ways, for example, as 3959681476 + 38080009881 = 62926^2 + 195141^2 .

It is not a de Polignac number, because 42039691357 - 2¹⁹ = 42039167069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42039691357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42039661357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1554007 + ... + 1580827.

It is an arithmetic number, because the mean of its divisors is an integer number (2806613847).

Almost surely, 2^42039691357 is an apocalyptic number.

It is an amenable number.

42039691357 is a deficient number, since it is larger than the sum of its proper divisors (2866130195).

42039691357 is a wasteful number, since it uses less digits than its factorization.

42039691357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27648.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 42039691357 in words is "forty-two billion, thirty-nine million, six hundred ninety-one thousand, three hundred fifty-seven".