812157283501 has 24 divisors (see below), whose sum is σ = 892597141800. Its totient is φ = 736375750656.

The previous prime is 812157283429. The next prime is 812157283529. The reversal of 812157283501 is 105382751218.

812157283501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 12 ways, for example, as 219951620100 + 592205663401 = 468990^2 + 769549^2 .

It is not a de Polignac number, because 812157283501 - 2¹⁵ = 812157250733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812157883501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6356095 + ... + 6482611.

It is an arithmetic number, because the mean of its divisors is an integer number (37191547575).

Almost surely, 2^812157283501 is an apocalyptic number.

It is an amenable number.

812157283501 is a deficient number, since it is larger than the sum of its proper divisors (80439858299).

812157283501 is a wasteful number, since it uses less digits than its factorization.

812157283501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127041 (or 127012 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 43.

The spelling of 812157283501 in words is "eight hundred twelve billion, one hundred fifty-seven million, two hundred eighty-three thousand, five hundred one".