40001654661 has 32 divisors (see below), whose sum is σ = 54400727040. Its totient is φ = 26140772736.

The previous prime is 40001654639. The next prime is 40001654663. The reversal of 40001654661 is 16645610004.

It is a happy number.

It is not a de Polignac number, because 40001654661 - 2⁶ = 40001654597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001654663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24585330 + ... + 24586956.

It is an arithmetic number, because the mean of its divisors is an integer number (1700022720).

Almost surely, 2^40001654661 is an apocalyptic number.

It is an amenable number.

40001654661 is a deficient number, since it is larger than the sum of its proper divisors (14399072379).

40001654661 is a wasteful number, since it uses less digits than its factorization.

40001654661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 40001654661 in words is "forty billion, one million, six hundred fifty-four thousand, six hundred sixty-one".