1375306661979 has 16 divisors (see below), whose sum is σ = 2042811187200. Its totient is φ = 914477181768.

The previous prime is 1375306661957. The next prime is 1375306662001. The reversal of 1375306661979 is 9791666035731.

It is an interprime number because it is at equal distance from previous prime (1375306661957) and next prime (1375306662001).

It is not a de Polignac number, because 1375306661979 - 2³¹ = 1373159178331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1375306611979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66487419 + ... + 66508100.

It is an arithmetic number, because the mean of its divisors is an integer number (127675699200).

Almost surely, 2^{1375306661979} is an apocalyptic number.

1375306661979 is a deficient number, since it is larger than the sum of its proper divisors (667504525221).

1375306661979 is a wasteful number, since it uses less digits than its factorization.

1375306661979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132995911 (or 132995905 counting only the distinct ones).

The product of its (nonzero) digits is 38578680, while the sum is 63.

The spelling of 1375306661979 in words is "one trillion, three hundred seventy-five billion, three hundred six million, six hundred sixty-one thousand, nine hundred seventy-nine".