40639521471 has 8 divisors (see below), whose sum is σ = 54205808304. Its totient is φ = 27083124480.

The previous prime is 40639521457. The next prime is 40639521473. The reversal of 40639521471 is 17412593604.

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

It is a de Polignac number, because none of the positive numbers 2^k-40639521471 is a prime.

It is a super-3 number, since 3×40639521471³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40639521473) 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, 2462866 + ... + 2479311.

It is an arithmetic number, because the mean of its divisors is an integer number (6775726038).

Almost surely, 2^40639521471 is an apocalyptic number.

40639521471 is a deficient number, since it is larger than the sum of its proper divisors (13566286833).

40639521471 is a wasteful number, since it uses less digits than its factorization.

40639521471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944921.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 40639521471 in words is "forty billion, six hundred thirty-nine million, five hundred twenty-one thousand, four hundred seventy-one".