1387736264891 has 2 divisors, whose sum is σ = 1387736264892. Its totient is φ = 1387736264890.

The previous prime is 1387736264861. The next prime is 1387736264897. The reversal of 1387736264891 is 1984626377831.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387736264891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1387736264897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693868132445 + 693868132446.

It is an arithmetic number, because the mean of its divisors is an integer number (693868132446).

Almost surely, 2^{1387736264891} is an apocalyptic number.

1387736264891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387736264891 is an equidigital number, since it uses as much as digits as its factorization.

1387736264891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 65.

The spelling of 1387736264891 in words is "one trillion, three hundred eighty-seven billion, seven hundred thirty-six million, two hundred sixty-four thousand, eight hundred ninety-one".