83647554077 has 4 divisors (see below), whose sum is σ = 84414962940. Its totient is φ = 82880145216.

The previous prime is 83647554059. The next prime is 83647554101. The reversal of 83647554077 is 77045574638.

It is a happy number.

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 60486975481 + 23160578596 = 245941^2 + 152186^2 .

It is a cyclic number.

It is not a de Polignac number, because 83647554077 - 2⁶ = 83647554013 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 (83647554007) 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, 383704268 + ... + 383704485.

It is an arithmetic number, because the mean of its divisors is an integer number (21103740735).

Almost surely, 2^83647554077 is an apocalyptic number.

It is an amenable number.

83647554077 is a deficient number, since it is larger than the sum of its proper divisors (767408863).

83647554077 is a wasteful number, since it uses less digits than its factorization.

83647554077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767408862.

The product of its (nonzero) digits is 19756800, while the sum is 56.

The spelling of 83647554077 in words is "eighty-three billion, six hundred forty-seven million, five hundred fifty-four thousand, seventy-seven".