40791577 has 4 divisors (see below), whose sum is σ = 41195556. Its totient is φ = 40387600.

The previous prime is 40791557. The next prime is 40791599. The reversal of 40791577 is 77519704.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28847641 + 11943936 = 5371^2 + 3456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40791577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40791547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201838 + ... + 202039.

It is an arithmetic number, because the mean of its divisors is an integer number (10298889).

Almost surely, 2^40791577 is an apocalyptic number.

It is an amenable number.

40791577 is a deficient number, since it is larger than the sum of its proper divisors (403979).

40791577 is a wasteful number, since it uses less digits than its factorization.

40791577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403978.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 40791577 is about 6386.8283991352. The cubic root of 40791577 is about 344.2364321306.

The spelling of 40791577 in words is "forty million, seven hundred ninety-one thousand, five hundred seventy-seven".