1397856511186 has 8 divisors (see below), whose sum is σ = 2096878653900. Its totient is φ = 698896959888.

The previous prime is 1397856511141. The next prime is 1397856511193. The reversal of 1397856511186 is 6811156587931.

It can be written as a sum of positive squares in 2 ways, for example, as 1391845455225 + 6011055961 = 1179765^2 + 77531^2 .

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

It is a super-3 number, since 3×1397856511186³ (a number of 37 digits) contains 333 as substring.

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, 15591981 + ... + 15681376.

Almost surely, 2^{1397856511186} is an apocalyptic number.

1397856511186 is a deficient number, since it is larger than the sum of its proper divisors (699022142714).

1397856511186 is a wasteful number, since it uses less digits than its factorization.

1397856511186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31295708.

The product of its digits is 10886400, while the sum is 61.

The spelling of 1397856511186 in words is "one trillion, three hundred ninety-seven billion, eight hundred fifty-six million, five hundred eleven thousand, one hundred eighty-six".