40476751821 has 24 divisors (see below), whose sum is σ = 67138475040. Its totient is φ = 23240239200.

The previous prime is 40476751793. The next prime is 40476751829. The reversal of 40476751821 is 12815767404.

40476751821 is a `hidden beast` number, since 40 + 4 + 76 + 7 + 518 + 21 = 666.

It is not a de Polignac number, because 40476751821 - 2⁹ = 40476751309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40476751829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10757490 + ... + 10761251.

It is an arithmetic number, because the mean of its divisors is an integer number (2797436460).

Almost surely, 2^40476751821 is an apocalyptic number.

It is an amenable number.

40476751821 is a deficient number, since it is larger than the sum of its proper divisors (26661723219).

40476751821 is a wasteful number, since it uses less digits than its factorization.

40476751821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21518777 (or 21518774 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

It can be divided in two parts, 40476 and 751821, that added together give a palindrome (792297).

The spelling of 40476751821 in words is "forty billion, four hundred seventy-six million, seven hundred fifty-one thousand, eight hundred twenty-one".