40687211665 has 8 divisors (see below), whose sum is σ = 48825739368. Its totient is φ = 32549045760.

The previous prime is 40687211651. The next prime is 40687211687. The reversal of 40687211665 is 56611278604.

It can be written as a sum of positive squares in 4 ways, for example, as 456078736 + 40231132929 = 21356^2 + 200577^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40687211665 - 2⁵ = 40687211633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370855 + ... + 467875.

It is an arithmetic number, because the mean of its divisors is an integer number (6103217421).

Almost surely, 2^40687211665 is an apocalyptic number.

It is an amenable number.

40687211665 is a deficient number, since it is larger than the sum of its proper divisors (8138527703).

40687211665 is an equidigital number, since it uses as much as digits as its factorization.

40687211665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180899.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 40687211665 in words is "forty billion, six hundred eighty-seven million, two hundred eleven thousand, six hundred sixty-five".