87775587451 has 4 divisors (see below), whose sum is σ = 88595920152. Its totient is φ = 86955254752.

The previous prime is 87775587437. The next prime is 87775587461. The reversal of 87775587451 is 15478557778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15478557778 = 2 ⋅7739278889.

It is a cyclic number.

It is not a de Polignac number, because 87775587451 - 2²⁵ = 87742033019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87775587461) 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, 410166190 + ... + 410166403.

It is an arithmetic number, because the mean of its divisors is an integer number (22148980038).

Almost surely, 2^87775587451 is an apocalyptic number.

87775587451 is a deficient number, since it is larger than the sum of its proper divisors (820332701).

87775587451 is a wasteful number, since it uses less digits than its factorization.

87775587451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820332700.

The product of its digits is 76832000, while the sum is 64.

The spelling of 87775587451 in words is "eighty-seven billion, seven hundred seventy-five million, five hundred eighty-seven thousand, four hundred fifty-one".