38721155855383 has 4 divisors (see below), whose sum is σ = 38721335753920. Its totient is φ = 38720975956848.

The previous prime is 38721155855353. The next prime is 38721155855407. The reversal of 38721155855383 is 38355855112783.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38721155855383 - 2²⁹ = 38720618984471 is a prime.

It is a super-2 number, since 2×38721155855383² (a number of 28 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 (38721155855353) 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, 89626023 + ... + 90057016.

It is an arithmetic number, because the mean of its divisors is an integer number (9680333938480).

Almost surely, 2^{38721155855383} is an apocalyptic number.

38721155855383 is a deficient number, since it is larger than the sum of its proper divisors (179898537).

38721155855383 is a wasteful number, since it uses less digits than its factorization.

38721155855383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179898536.

The product of its digits is 120960000, while the sum is 64.

The spelling of 38721155855383 in words is "thirty-eight trillion, seven hundred twenty-one billion, one hundred fifty-five million, eight hundred fifty-five thousand, three hundred eighty-three".