1399716145217 has 32 divisors (see below), whose sum is σ = 1589401608480. Its totient is φ = 1223481692160.

The previous prime is 1399716145193. The next prime is 1399716145259. The reversal of 1399716145217 is 7125416179931.

It is a Cunningham number, because it is equal to 1183096²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 390663750961 + 1009052394256 = 625031^2 + 1004516^2 .

It is not a de Polignac number, because 1399716145217 - 2¹⁶ = 1399716079681 is a prime.

It is a super-2 number, since 2×1399716145217² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399716145117) 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, 57872867 + ... + 57897047.

It is an arithmetic number, because the mean of its divisors is an integer number (49668800265).

Almost surely, 2^{1399716145217} is an apocalyptic number.

It is an amenable number.

1399716145217 is a deficient number, since it is larger than the sum of its proper divisors (189685463263).

1399716145217 is a wasteful number, since it uses less digits than its factorization.

1399716145217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27173.

The product of its digits is 2857680, while the sum is 56.

The spelling of 1399716145217 in words is "one trillion, three hundred ninety-nine billion, seven hundred sixteen million, one hundred forty-five thousand, two hundred seventeen".