40024400442421 has 16 divisors (see below), whose sum is σ = 43967894446080. Its totient is φ = 36269811728640.

The previous prime is 40024400442413. The next prime is 40024400442437. The reversal of 40024400442421 is 12424400442004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40024400442421 - 2³ = 40024400442413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40024400442451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192656661 + ... + 192864298.

It is an arithmetic number, because the mean of its divisors is an integer number (2747993402880).

Almost surely, 2^{40024400442421} is an apocalyptic number.

It is an amenable number.

40024400442421 is a deficient number, since it is larger than the sum of its proper divisors (3943494003659).

40024400442421 is a wasteful number, since it uses less digits than its factorization.

40024400442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385521204.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 40024400442421 its reverse (12424400442004), we get a palindrome (52448800884425).

The spelling of 40024400442421 in words is "forty trillion, twenty-four billion, four hundred million, four hundred forty-two thousand, four hundred twenty-one".