83771239551 has 4 divisors (see below), whose sum is σ = 111694986072. Its totient is φ = 55847493032.

The previous prime is 83771239481. The next prime is 83771239583. The reversal of 83771239551 is 15593217738.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 83771239551 - 2²¹ = 83769142399 is a prime.

It is a super-2 number, since 2×83771239551² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 83771239494 and 83771239503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83771239051) 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, 13961873256 + ... + 13961873261.

It is an arithmetic number, because the mean of its divisors is an integer number (27923746518).

Almost surely, 2^83771239551 is an apocalyptic number.

83771239551 is a deficient number, since it is larger than the sum of its proper divisors (27923746521).

83771239551 is a wasteful number, since it uses less digits than its factorization.

83771239551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27923746520.

The product of its digits is 1587600, while the sum is 51.

The spelling of 83771239551 in words is "eighty-three billion, seven hundred seventy-one million, two hundred thirty-nine thousand, five hundred fifty-one".