2138644957363 has 8 divisors (see below), whose sum is σ = 2189773941696. Its totient is φ = 2087579293800.

The previous prime is 2138644957357. The next prime is 2138644957381. The reversal of 2138644957363 is 3637594468312.

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 2138644957363 - 2²⁵ = 2138611402931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138644957343) 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, 15761833 + ... + 15896938.

It is an arithmetic number, because the mean of its divisors is an integer number (273721742712).

Almost surely, 2^{2138644957363} is an apocalyptic number.

2138644957363 is a deficient number, since it is larger than the sum of its proper divisors (51128984333).

2138644957363 is a wasteful number, since it uses less digits than its factorization.

2138644957363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31660385.

The product of its digits is 78382080, while the sum is 61.

The spelling of 2138644957363 in words is "two trillion, one hundred thirty-eight billion, six hundred forty-four million, nine hundred fifty-seven thousand, three hundred sixty-three".