83612639801809 has 4 divisors (see below), whose sum is σ = 88531030378404. Its totient is φ = 78694249225216.

The previous prime is 83612639801797. The next prime is 83612639801827. The reversal of 83612639801809 is 90810893621638.

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 62306079296400 + 21306560505409 = 7893420^2 + 4615903^2 .

It is a cyclic number.

It is not a de Polignac number, because 83612639801809 - 2¹⁵ = 83612639769041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83612639801849) 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, 2459195288272 + ... + 2459195288305.

It is an arithmetic number, because the mean of its divisors is an integer number (22132757594601).

Almost surely, 2^{83612639801809} is an apocalyptic number.

It is an amenable number.

83612639801809 is a deficient number, since it is larger than the sum of its proper divisors (4918390576595).

83612639801809 is a wasteful number, since it uses less digits than its factorization.

83612639801809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918390576594.

The product of its (nonzero) digits is 26873856, while the sum is 64.

The spelling of 83612639801809 in words is "eighty-three trillion, six hundred twelve billion, six hundred thirty-nine million, eight hundred one thousand, eight hundred nine".