91195526387 has 4 divisors (see below), whose sum is σ = 104223458736. Its totient is φ = 78167594040.

The previous prime is 91195526381. The next prime is 91195526419. The reversal of 91195526387 is 78362559119.

It is a happy number.

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 91195526387 - 2¹⁰ = 91195525363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91195526381) 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, 6513966164 + ... + 6513966177.

It is an arithmetic number, because the mean of its divisors is an integer number (26055864684).

Almost surely, 2^91195526387 is an apocalyptic number.

91195526387 is a deficient number, since it is larger than the sum of its proper divisors (13027932349).

91195526387 is a wasteful number, since it uses less digits than its factorization.

91195526387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13027932348.

The product of its digits is 4082400, while the sum is 56.

The spelling of 91195526387 in words is "ninety-one billion, one hundred ninety-five million, five hundred twenty-six thousand, three hundred eighty-seven".