40105751621 has 16 divisors (see below), whose sum is σ = 44534988288. Its totient is φ = 35876520000.

The previous prime is 40105751563. The next prime is 40105751633. The reversal of 40105751621 is 12615750104.

40105751621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40105751621 - 2²² = 40101557317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40105751321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45365 + ... + 286826.

It is an arithmetic number, because the mean of its divisors is an integer number (2783436768).

Almost surely, 2^40105751621 is an apocalyptic number.

It is an amenable number.

40105751621 is a deficient number, since it is larger than the sum of its proper divisors (4429236667).

40105751621 is a wasteful number, since it uses less digits than its factorization.

40105751621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332492.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 40105751621 in words is "forty billion, one hundred five million, seven hundred fifty-one thousand, six hundred twenty-one".