3990812158461 has 8 divisors (see below), whose sum is σ = 5552434307520. Its totient is φ = 2544865724192.

The previous prime is 3990812158451. The next prime is 3990812158513. The reversal of 3990812158461 is 1648512180993.

It is a happy number.

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 3990812158461 - 2²¹ = 3990810061309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990812158451) 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, 28918928616 + ... + 28918928753.

It is an arithmetic number, because the mean of its divisors is an integer number (694054288440).

Almost surely, 2^{3990812158461} is an apocalyptic number.

It is an amenable number.

3990812158461 is a deficient number, since it is larger than the sum of its proper divisors (1561622149059).

3990812158461 is a wasteful number, since it uses less digits than its factorization.

3990812158461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57837857395.

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 3990812158461 in words is "three trillion, nine hundred ninety billion, eight hundred twelve million, one hundred fifty-eight thousand, four hundred sixty-one".