40647611639 has 4 divisors (see below), whose sum is σ = 42786959640. Its totient is φ = 38508263640.

The previous prime is 40647611621. The next prime is 40647611699. The reversal of 40647611639 is 93611674604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40647611639 - 2¹² = 40647607543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40647611593 and 40647611602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40647611699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069673972 + ... + 1069674009.

It is an arithmetic number, because the mean of its divisors is an integer number (10696739910).

Almost surely, 2^40647611639 is an apocalyptic number.

40647611639 is a deficient number, since it is larger than the sum of its proper divisors (2139348001).

40647611639 is a wasteful number, since it uses less digits than its factorization.

40647611639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139348000.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 40647611639 in words is "forty billion, six hundred forty-seven million, six hundred eleven thousand, six hundred thirty-nine".