1385572755831 has 48 divisors (see below), whose sum is σ = 2053054819200. Its totient is φ = 830502953280.

The previous prime is 1385572755829. The next prime is 1385572755841.

1385572755831 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1385572755831 - 2¹ = 1385572755829 is a prime.

It is a super-2 number, since 2×1385572755831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385572755841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21611140 + ... + 21675158.

It is an arithmetic number, because the mean of its divisors is an integer number (42771975400).

Almost surely, 2^{1385572755831} is an apocalyptic number.

1385572755831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1385572755831 is a deficient number, since it is larger than the sum of its proper divisors (667482063369).

1385572755831 is a wasteful number, since it uses less digits than its factorization.

1385572755831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64700 (or 64689 counting only the distinct ones).

The product of its digits is 35280000, while the sum is 60.

The spelling of 1385572755831 in words is "one trillion, three hundred eighty-five billion, five hundred seventy-two million, seven hundred fifty-five thousand, eight hundred thirty-one".