1372873186865 has 4 divisors (see below), whose sum is σ = 1647447824244. Its totient is φ = 1098298549488.

The previous prime is 1372873186813. The next prime is 1372873186877. The reversal of 1372873186865 is 5686813782731.

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 149710181776 + 1223163005089 = 386924^2 + 1105967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372873186865 - 2¹⁰ = 1372873185841 is a prime.

It is a super-2 number, since 2×1372873186865² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137287318682 + ... + 137287318691.

It is an arithmetic number, because the mean of its divisors is an integer number (411861956061).

Almost surely, 2^{1372873186865} is an apocalyptic number.

It is an amenable number.

1372873186865 is a deficient number, since it is larger than the sum of its proper divisors (274574637379).

1372873186865 is an equidigital number, since it uses as much as digits as its factorization.

1372873186865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274574637378.

The product of its digits is 81285120, while the sum is 65.

The spelling of 1372873186865 in words is "one trillion, three hundred seventy-two billion, eight hundred seventy-three million, one hundred eighty-six thousand, eight hundred sixty-five".