381139253881 has 8 divisors (see below), whose sum is σ = 389763529344. Its totient is φ = 372568051440.

The previous prime is 381139253821. The next prime is 381139253909. The reversal of 381139253881 is 188352931183.

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 381139253881 - 2¹³ = 381139245689 is a prime.

It is a super-2 number, since 2×381139253881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381139253821) 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, 13253731 + ... + 13282456.

It is an arithmetic number, because the mean of its divisors is an integer number (48720441168).

Almost surely, 2^381139253881 is an apocalyptic number.

It is an amenable number.

381139253881 is a deficient number, since it is larger than the sum of its proper divisors (8624275463).

381139253881 is a wasteful number, since it uses less digits than its factorization.

381139253881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26536511.

The product of its digits is 1244160, while the sum is 52.

The spelling of 381139253881 in words is "three hundred eighty-one billion, one hundred thirty-nine million, two hundred fifty-three thousand, eight hundred eighty-one".