1398770164537 has 4 divisors (see below), whose sum is σ = 1408980165876. Its totient is φ = 1388560163200.

The previous prime is 1398770164529. The next prime is 1398770164559. The reversal of 1398770164537 is 7354610778931.

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 357025370256 + 1041744794281 = 597516^2 + 1020659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398770164537 - 2³ = 1398770164529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398770164037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5105000464 + ... + 5105000737.

It is an arithmetic number, because the mean of its divisors is an integer number (352245041469).

Almost surely, 2^{1398770164537} is an apocalyptic number.

It is an amenable number.

1398770164537 is a deficient number, since it is larger than the sum of its proper divisors (10210001339).

1398770164537 is a wasteful number, since it uses less digits than its factorization.

1398770164537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210001338.

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 1398770164537 in words is "one trillion, three hundred ninety-eight billion, seven hundred seventy million, one hundred sixty-four thousand, five hundred thirty-seven".