812954689601 has 4 divisors (see below), whose sum is σ = 832782852804. Its totient is φ = 793126526400.

The previous prime is 812954689597. The next prime is 812954689609. The reversal of 812954689601 is 106986459218.

It is a happy number.

It is a Cunningham number, because it is equal to 901640²+1.

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 39172326400 + 773782363201 = 197920^2 + 879649^2 .

It is a cyclic number.

It is not a de Polignac number, because 812954689601 - 2² = 812954689597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812954689609) 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, 9914081540 + ... + 9914081621.

It is an arithmetic number, because the mean of its divisors is an integer number (208195713201).

Almost surely, 2^812954689601 is an apocalyptic number.

It is an amenable number.

812954689601 is a deficient number, since it is larger than the sum of its proper divisors (19828163203).

812954689601 is a wasteful number, since it uses less digits than its factorization.

812954689601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828163202.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 812954689601 in words is "eight hundred twelve billion, nine hundred fifty-four million, six hundred eighty-nine thousand, six hundred one".