1031378332538 has 4 divisors (see below), whose sum is σ = 1547067498810. Its totient is φ = 515689166268.

The previous prime is 1031378332511. The next prime is 1031378332547. The reversal of 1031378332538 is 8352338731301.

1031378332538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 738109511689 + 293268820849 = 859133^2 + 541543^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1031378332492 and 1031378332501.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257844583133 + ... + 257844583136.

Almost surely, 2^{1031378332538} is an apocalyptic number.

1031378332538 is a deficient number, since it is larger than the sum of its proper divisors (515689166272).

1031378332538 is an equidigital number, since it uses as much as digits as its factorization.

1031378332538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515689166271.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 1031378332538 in words is "one trillion, thirty-one billion, three hundred seventy-eight million, three hundred thirty-two thousand, five hundred thirty-eight".