83155656457 has 4 divisors (see below), whose sum is σ = 84157531920. Its totient is φ = 82153780996.

The previous prime is 83155656391. The next prime is 83155656533. The reversal of 83155656457 is 75465655138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83155656457 - 2³¹ = 81008172809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83155656398 and 83155656407.

It is not an unprimeable number, because it can be changed into a prime (83155656257) 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, 500937607 + ... + 500937772.

It is an arithmetic number, because the mean of its divisors is an integer number (21039382980).

Almost surely, 2^83155656457 is an apocalyptic number.

It is an amenable number.

83155656457 is a deficient number, since it is larger than the sum of its proper divisors (1001875463).

83155656457 is a wasteful number, since it uses less digits than its factorization.

83155656457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001875462.

The product of its digits is 15120000, while the sum is 55.

The spelling of 83155656457 in words is "eighty-three billion, one hundred fifty-five million, six hundred fifty-six thousand, four hundred fifty-seven".