40026144145661 has 4 divisors (see below), whose sum is σ = 40956984707232. Its totient is φ = 39095303584092.

The previous prime is 40026144145643. The next prime is 40026144145693. The reversal of 40026144145661 is 16654144162004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40026144145661 - 2⁶ = 40026144145597 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 (40026144145601) 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, 465420280721 + ... + 465420280806.

It is an arithmetic number, because the mean of its divisors is an integer number (10239246176808).

Almost surely, 2^{40026144145661} is an apocalyptic number.

It is an amenable number.

40026144145661 is a deficient number, since it is larger than the sum of its proper divisors (930840561571).

40026144145661 is an equidigital number, since it uses as much as digits as its factorization.

40026144145661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930840561570.

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 40026144145661 in words is "forty trillion, twenty-six billion, one hundred forty-four million, one hundred forty-five thousand, six hundred sixty-one".