40821577647 has 8 divisors (see below), whose sum is σ = 54456033456. Its totient is φ = 27200753472.

The previous prime is 40821577637. The next prime is 40821577663. The reversal of 40821577647 is 74677512804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40821577647 - 2⁴ = 40821577631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40821577647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40821577627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3400918 + ... + 3412899.

It is an arithmetic number, because the mean of its divisors is an integer number (6807004182).

Almost surely, 2^40821577647 is an apocalyptic number.

40821577647 is a deficient number, since it is larger than the sum of its proper divisors (13634455809).

40821577647 is a wasteful number, since it uses less digits than its factorization.

40821577647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815817.

The product of its (nonzero) digits is 2634240, while the sum is 51.

It can be divided in two parts, 4082157 and 7647, that added together give a palindrome (4089804).

The spelling of 40821577647 in words is "forty billion, eight hundred twenty-one million, five hundred seventy-seven thousand, six hundred forty-seven".