82954690561 has 4 divisors (see below), whose sum is σ = 82955306052. Its totient is φ = 82954075072.

The previous prime is 82954690541. The next prime is 82954690583. The reversal of 82954690561 is 16509645928.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 53557530625 + 29397159936 = 231425^2 + 171456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82954690561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82954690541) 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, 8740 + ... + 407413.

It is an arithmetic number, because the mean of its divisors is an integer number (20738826513).

Almost surely, 2^82954690561 is an apocalyptic number.

It is an amenable number.

82954690561 is a deficient number, since it is larger than the sum of its proper divisors (615491).

82954690561 is a wasteful number, since it uses less digits than its factorization.

82954690561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615490.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 82954690561 in words is "eighty-two billion, nine hundred fifty-four million, six hundred ninety thousand, five hundred sixty-one".