512400969697 has 4 divisors (see below), whose sum is σ = 518574475440. Its totient is φ = 506227463956.

The previous prime is 512400969649. The next prime is 512400969727. The reversal of 512400969697 is 796969004215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 796969004215 = 5 ⋅159393800843.

It is a cyclic number.

It is not a de Polignac number, because 512400969697 - 2²³ = 512392581089 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512400969607) 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, 3086752747 + ... + 3086752912.

It is an arithmetic number, because the mean of its divisors is an integer number (129643618860).

Almost surely, 2^512400969697 is an apocalyptic number.

It is an amenable number.

512400969697 is a deficient number, since it is larger than the sum of its proper divisors (6173505743).

512400969697 is an equidigital number, since it uses as much as digits as its factorization.

512400969697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173505742.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 512400969697 in words is "five hundred twelve billion, four hundred million, nine hundred sixty-nine thousand, six hundred ninety-seven".