4090074155621 has 8 divisors (see below), whose sum is σ = 4278651773400. Its totient is φ = 3904665909760.

The previous prime is 4090074155611. The next prime is 4090074155623. The reversal of 4090074155621 is 1265514700904.

It can be written as a sum of positive squares in 4 ways, for example, as 14783155396 + 4075291000225 = 121586^2 + 2018735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4090074155621 - 2¹⁴ = 4090074139237 is a prime.

It is a super-2 number, since 2×4090074155621² (a number of 26 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 (4090074155623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792340340 + ... + 792345501.

It is an arithmetic number, because the mean of its divisors is an integer number (534831471675).

Almost surely, 2^{4090074155621} is an apocalyptic number.

It is an amenable number.

4090074155621 is a deficient number, since it is larger than the sum of its proper divisors (188577617779).

4090074155621 is a wasteful number, since it uses less digits than its factorization.

4090074155621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584685959.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 4090074155621 in words is "four trillion, ninety billion, seventy-four million, one hundred fifty-five thousand, six hundred twenty-one".