40164321251 has 4 divisors (see below), whose sum is σ = 41910596112. Its totient is φ = 38418046392.

The previous prime is 40164321233. The next prime is 40164321283. The reversal of 40164321251 is 15212346104.

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

It is a cyclic number.

It is not a de Polignac number, because 40164321251 - 2¹⁰ = 40164320227 is a prime.

It is a super-2 number, since 2×40164321251² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40164327251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873137396 + ... + 873137441.

It is an arithmetic number, because the mean of its divisors is an integer number (10477649028).

Almost surely, 2^40164321251 is an apocalyptic number.

40164321251 is a deficient number, since it is larger than the sum of its proper divisors (1746274861).

40164321251 is a wasteful number, since it uses less digits than its factorization.

40164321251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746274860.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 40164321251 its reverse (15212346104), we get a palindrome (55376667355).

The spelling of 40164321251 in words is "forty billion, one hundred sixty-four million, three hundred twenty-one thousand, two hundred fifty-one".