1398783864537 has 24 divisors (see below), whose sum is σ = 2035334541864. Its totient is φ = 925660790784.

The previous prime is 1398783864509. The next prime is 1398783864553. The reversal of 1398783864537 is 7354683878931.

1398783864537 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 7 + 8 + 3 + 86 + 4 + 537 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 191434896 + 1398592429641 = 13836^2 + 1182621^2 .

It is not a de Polignac number, because 1398783864537 - 2¹⁸ = 1398783602393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398783864637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39281613 + ... + 39317205.

It is an arithmetic number, because the mean of its divisors is an integer number (84805605911).

Almost surely, 2^{1398783864537} is an apocalyptic number.

It is an amenable number.

1398783864537 is a deficient number, since it is larger than the sum of its proper divisors (636550677327).

1398783864537 is a wasteful number, since it uses less digits than its factorization.

1398783864537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67609 (or 67606 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 72.

The spelling of 1398783864537 in words is "one trillion, three hundred ninety-eight billion, seven hundred eighty-three million, eight hundred sixty-four thousand, five hundred thirty-seven".