40021646654 has 16 divisors (see below), whose sum is σ = 65868528240. Its totient is φ = 18086501760.

The previous prime is 40021646641. The next prime is 40021646669. The reversal of 40021646654 is 45664612004.

It is a congruent 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, 5253899 + ... + 5261510.

It is an arithmetic number, because the mean of its divisors is an integer number (4116783015).

Almost surely, 2^40021646654 is an apocalyptic number.

40021646654 is a deficient number, since it is larger than the sum of its proper divisors (25846881586).

40021646654 is a wasteful number, since it uses less digits than its factorization.

40021646654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515595.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 40021646654 in words is "forty billion, twenty-one million, six hundred forty-six thousand, six hundred fifty-four".