1397387649009 has 32 divisors (see below), whose sum is σ = 2098314417024. Its totient is φ = 819742740480.

The previous prime is 1397387648981. The next prime is 1397387649013. The reversal of 1397387649009 is 9009467837931.

It is a de Polignac number, because none of the positive numbers 2^k-1397387649009 is a prime.

It is a super-3 number, since 3×1397387649009³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1397387649059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2729274 + ... + 3200579.

It is an arithmetic number, because the mean of its divisors is an integer number (65572325532).

Almost surely, 2^{1397387649009} is an apocalyptic number.

It is an amenable number.

1397387649009 is a deficient number, since it is larger than the sum of its proper divisors (700926768015).

1397387649009 is a wasteful number, since it uses less digits than its factorization.

1397387649009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930097.

The product of its (nonzero) digits is 61725888, while the sum is 66.

The spelling of 1397387649009 in words is "one trillion, three hundred ninety-seven billion, three hundred eighty-seven million, six hundred forty-nine thousand, nine".