1024138815621 has 8 divisors (see below), whose sum is σ = 1365531471360. Its totient is φ = 682752685152.

The previous prime is 1024138815611. The next prime is 1024138815641. The reversal of 1024138815621 is 1265188314201.

It is a happy number.

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

It is not a de Polignac number, because 1024138815621 - 2⁵ = 1024138815589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024138815611) 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, 1252536 + ... + 1901873.

It is an arithmetic number, because the mean of its divisors is an integer number (170691433920).

Almost surely, 2^{1024138815621} is an apocalyptic number.

It is an amenable number.

1024138815621 is a deficient number, since it is larger than the sum of its proper divisors (341392655739).

1024138815621 is a wasteful number, since it uses less digits than its factorization.

1024138815621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262635.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 1024138815621 in words is "one trillion, twenty-four billion, one hundred thirty-eight million, eight hundred fifteen thousand, six hundred twenty-one".