381507993593 has 4 divisors (see below), whose sum is σ = 381515532288. Its totient is φ = 381500454900.

The previous prime is 381507993571. The next prime is 381507993619. The reversal of 381507993593 is 395399705183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381507993593 - 2³² = 377213026297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381507993553) 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, 3692921 + ... + 3794822.

It is an arithmetic number, because the mean of its divisors is an integer number (95378883072).

Almost surely, 2^381507993593 is an apocalyptic number.

It is an amenable number.

381507993593 is a deficient number, since it is larger than the sum of its proper divisors (7538695).

381507993593 is an equidigital number, since it uses as much as digits as its factorization.

381507993593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7538694.

The product of its (nonzero) digits is 27556200, while the sum is 62.

The spelling of 381507993593 in words is "three hundred eighty-one billion, five hundred seven million, nine hundred ninety-three thousand, five hundred ninety-three".