1375877881633 has 4 divisors (see below), whose sum is σ = 1409435878788. Its totient is φ = 1342319884480.

The previous prime is 1375877881619. The next prime is 1375877881661. The reversal of 1375877881633 is 3361887785731.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46579567329 + 1329298314304 = 215823^2 + 1152952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375877881633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375877881033) 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, 16778998516 + ... + 16778998597.

It is an arithmetic number, because the mean of its divisors is an integer number (352358969697).

Almost surely, 2^{1375877881633} is an apocalyptic number.

It is an amenable number.

1375877881633 is a deficient number, since it is larger than the sum of its proper divisors (33557997155).

1375877881633 is an equidigital number, since it uses as much as digits as its factorization.

1375877881633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33557997154.

The product of its digits is 142248960, while the sum is 67.

The spelling of 1375877881633 in words is "one trillion, three hundred seventy-five billion, eight hundred seventy-seven million, eight hundred eighty-one thousand, six hundred thirty-three".