40639502345 has 16 divisors (see below), whose sum is σ = 52744163472. Its totient is φ = 29881896960.

The previous prime is 40639502291. The next prime is 40639502353. The reversal of 40639502345 is 54320593604.

It can be written as a sum of positive squares in 8 ways, for example, as 8468416576 + 32171085769 = 92024^2 + 179363^2 .

It is not a de Polignac number, because 40639502345 - 2¹⁴ = 40639485961 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326536 + ... + 1356825.

It is an arithmetic number, because the mean of its divisors is an integer number (3296510217).

Almost surely, 2^40639502345 is an apocalyptic number.

It is an amenable number.

40639502345 is a deficient number, since it is larger than the sum of its proper divisors (12104661127).

40639502345 is a wasteful number, since it uses less digits than its factorization.

40639502345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683612.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 40639502345 in words is "forty billion, six hundred thirty-nine million, five hundred two thousand, three hundred forty-five".