1375138877649 has 8 divisors (see below), whose sum is σ = 1833524196000. Its totient is φ = 916756405536.

The previous prime is 1375138877647. The next prime is 1375138877677. The reversal of 1375138877649 is 9467788315731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1375138877649 - 2¹ = 1375138877647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375138877647) 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, 1012602 + ... + 1943100.

It is an arithmetic number, because the mean of its divisors is an integer number (229190524500).

Almost surely, 2^{1375138877649} is an apocalyptic number.

It is an amenable number.

1375138877649 is a deficient number, since it is larger than the sum of its proper divisors (458385318351).

1375138877649 is an equidigital number, since it uses as much as digits as its factorization.

1375138877649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423119.

The product of its digits is 213373440, while the sum is 69.

The spelling of 1375138877649 in words is "one trillion, three hundred seventy-five billion, one hundred thirty-eight million, eight hundred seventy-seven thousand, six hundred forty-nine".