812661116007 has 16 divisors (see below), whose sum is σ = 1177803607680. Its totient is φ = 495425321952.

The previous prime is 812661115993. The next prime is 812661116017. The reversal of 812661116007 is 700611166218.

812661116007 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812661116007 - 2⁶ = 812661115943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812661116017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97367157 + ... + 97375502.

It is an arithmetic number, because the mean of its divisors is an integer number (73612725480).

Almost surely, 2^812661116007 is an apocalyptic number.

812661116007 is a deficient number, since it is larger than the sum of its proper divisors (365142491673).

812661116007 is a wasteful number, since it uses less digits than its factorization.

812661116007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194742782.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 812661116007 in words is "eight hundred twelve billion, six hundred sixty-one million, one hundred sixteen thousand, seven".