91538083519 has 4 divisors (see below), whose sum is σ = 93089576520. Its totient is φ = 89986590520.

The previous prime is 91538083517. The next prime is 91538083523.

91538083519 is nontrivially palindromic in base 10.

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 91538083519 - 2¹ = 91538083517 is a prime.

It is a super-2 number, since 2×91538083519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91538083517) 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, 775746412 + ... + 775746529.

It is an arithmetic number, because the mean of its divisors is an integer number (23272394130).

Almost surely, 2^91538083519 is an apocalyptic number.

91538083519 is a deficient number, since it is larger than the sum of its proper divisors (1551493001).

91538083519 is a wasteful number, since it uses less digits than its factorization.

91538083519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551493000.

The product of its (nonzero) digits is 1166400, while the sum is 52.

It can be divided in two parts, 915380 and 83519, that added together give a palindrome (998899).

The spelling of 91538083519 in words is "ninety-one billion, five hundred thirty-eight million, eighty-three thousand, five hundred nineteen".