87671219091 has 16 divisors (see below), whose sum is σ = 123061171200. Its totient is φ = 55365065568.

The previous prime is 87671219081. The next prime is 87671219107. The reversal of 87671219091 is 19091217678.

It is a happy number.

It is not a de Polignac number, because 87671219091 - 2⁷ = 87671218963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87671219081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453790 + ... + 617468.

It is an arithmetic number, because the mean of its divisors is an integer number (7691323200).

Almost surely, 2^87671219091 is an apocalyptic number.

87671219091 is a deficient number, since it is larger than the sum of its proper divisors (35389952109).

87671219091 is a wasteful number, since it uses less digits than its factorization.

87671219091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173098.

The product of its (nonzero) digits is 381024, while the sum is 51.

The spelling of 87671219091 in words is "eighty-seven billion, six hundred seventy-one million, two hundred nineteen thousand, ninety-one".