40890160621 has 4 divisors (see below), whose sum is σ = 40895224992. Its totient is φ = 40885096252.

The previous prime is 40890160567. The next prime is 40890160643. The reversal of 40890160621 is 12606109804.

It is a happy number.

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 40890160621 - 2¹⁵ = 40890127853 is a prime.

It is a super-2 number, since 2×40890160621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40890160691) 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, 2520055 + ... + 2536228.

It is an arithmetic number, because the mean of its divisors is an integer number (10223806248).

Almost surely, 2^40890160621 is an apocalyptic number.

It is an amenable number.

40890160621 is a deficient number, since it is larger than the sum of its proper divisors (5064371).

40890160621 is an equidigital number, since it uses as much as digits as its factorization.

40890160621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5064370.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 40890160621 in words is "forty billion, eight hundred ninety million, one hundred sixty thousand, six hundred twenty-one".