40400034023213 has 4 divisors (see below), whose sum is σ = 41385400706748. Its totient is φ = 39414667339680.

The previous prime is 40400034023191. The next prime is 40400034023233. The reversal of 40400034023213 is 31232043000404.

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 14722737828484 + 25677296194729 = 3837022^2 + 5067277^2 .

It is a cyclic number.

It is not a de Polignac number, because 40400034023213 - 2²⁴ = 40400017245997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400034023233) 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, 492683341706 + ... + 492683341787.

It is an arithmetic number, because the mean of its divisors is an integer number (10346350176687).

Almost surely, 2^{40400034023213} is an apocalyptic number.

It is an amenable number.

40400034023213 is a deficient number, since it is larger than the sum of its proper divisors (985366683535).

40400034023213 is an equidigital number, since it uses as much as digits as its factorization.

40400034023213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985366683534.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 40400034023213 its reverse (31232043000404), we get a palindrome (71632077023617).

The spelling of 40400034023213 in words is "forty trillion, four hundred billion, thirty-four million, twenty-three thousand, two hundred thirteen".