83415215887 has 2 divisors, whose sum is σ = 83415215888. Its totient is φ = 83415215886.

The previous prime is 83415215881. The next prime is 83415215951. The reversal of 83415215887 is 78851251438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83415215887 - 2¹¹ = 83415213839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83415215881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41707607943 + 41707607944.

It is an arithmetic number, because the mean of its divisors is an integer number (41707607944).

Almost surely, 2^83415215887 is an apocalyptic number.

83415215887 is a deficient number, since it is larger than the sum of its proper divisors (1).

83415215887 is an equidigital number, since it uses as much as digits as its factorization.

83415215887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2150400, while the sum is 52.

The spelling of 83415215887 in words is "eighty-three billion, four hundred fifteen million, two hundred fifteen thousand, eight hundred eighty-seven".