83540942465 has 4 divisors (see below), whose sum is σ = 100249130964. Its totient is φ = 66832753968.

The previous prime is 83540942431. The next prime is 83540942473. The reversal of 83540942465 is 56424904538.

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 34652194801 + 48888747664 = 186151^2 + 221108^2 .

It is a cyclic number.

It is not a de Polignac number, because 83540942465 - 2²² = 83536748161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8354094242 + ... + 8354094251.

It is an arithmetic number, because the mean of its divisors is an integer number (25062282741).

Almost surely, 2^83540942465 is an apocalyptic number.

It is an amenable number.

83540942465 is a deficient number, since it is larger than the sum of its proper divisors (16708188499).

83540942465 is a wasteful number, since it uses less digits than its factorization.

83540942465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16708188498.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 83540942465 in words is "eighty-three billion, five hundred forty million, nine hundred forty-two thousand, four hundred sixty-five".