40651641 has 48 divisors (see below), whose sum is σ = 65729664. Its totient is φ = 24095232.

The previous prime is 40651631. The next prime is 40651643. The reversal of 40651641 is 14615604.

40651641 is a `hidden beast` number, since 4 + 0 + 651 + 6 + 4 + 1 = 666.

It is not a de Polignac number, because 40651641 - 2⁶ = 40651577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40651643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 243340 + ... + 243506.

It is an arithmetic number, because the mean of its divisors is an integer number (1369368).

Almost surely, 2^40651641 is an apocalyptic number.

It is an amenable number.

40651641 is a deficient number, since it is larger than the sum of its proper divisors (25078023).

40651641 is a wasteful number, since it uses less digits than its factorization.

40651641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40651641 is about 6375.8639414592. The cubic root of 40651641 is about 343.8423453939.

The spelling of 40651641 in words is "forty million, six hundred fifty-one thousand, six hundred forty-one".