87453773491 has 4 divisors (see below), whose sum is σ = 99947169712. Its totient is φ = 74960377272.

The previous prime is 87453773483. The next prime is 87453773507. The reversal of 87453773491 is 19437735478.

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 87453773491 - 2³ = 87453773483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87453773791) 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, 6246698100 + ... + 6246698113.

It is an arithmetic number, because the mean of its divisors is an integer number (24986792428).

Almost surely, 2^87453773491 is an apocalyptic number.

87453773491 is a deficient number, since it is larger than the sum of its proper divisors (12493396221).

87453773491 is a wasteful number, since it uses less digits than its factorization.

87453773491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12493396220.

The product of its digits is 17781120, while the sum is 58.

The spelling of 87453773491 in words is "eighty-seven billion, four hundred fifty-three million, seven hundred seventy-three thousand, four hundred ninety-one".