40545999 has 12 divisors (see below), whose sum is σ = 63071736. Its totient is φ = 24951312.

The previous prime is 40545979. The next prime is 40546001. The reversal of 40545999 is 99954504.

40545999 is a `hidden beast` number, since 4 + 0 + 54 + 599 + 9 = 666.

It is not a de Polignac number, because 40545999 - 2⁷ = 40545871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40545919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173157 + ... + 173390.

It is an arithmetic number, because the mean of its divisors is an integer number (5255978).

Almost surely, 2^40545999 is an apocalyptic number.

40545999 is a deficient number, since it is larger than the sum of its proper divisors (22525737).

40545999 is a wasteful number, since it uses less digits than its factorization.

40545999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346566 (or 346563 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 40545999 is about 6367.5740278382. The cubic root of 40545999 is about 343.5442376745.

The spelling of 40545999 in words is "forty million, five hundred forty-five thousand, nine hundred ninety-nine".