87878280653 has 4 divisors (see below), whose sum is σ = 91699075488. Its totient is φ = 84057485820.

The previous prime is 87878280641. The next prime is 87878280661. The reversal of 87878280653 is 35608287878.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87878280653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87878280613) 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, 1910397383 + ... + 1910397428.

It is an arithmetic number, because the mean of its divisors is an integer number (22924768872).

Almost surely, 2^87878280653 is an apocalyptic number.

It is an amenable number.

87878280653 is a deficient number, since it is larger than the sum of its proper divisors (3820794835).

87878280653 is a wasteful number, since it uses less digits than its factorization.

87878280653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820794834.

The product of its (nonzero) digits is 36126720, while the sum is 62.

The spelling of 87878280653 in words is "eighty-seven billion, eight hundred seventy-eight million, two hundred eighty thousand, six hundred fifty-three".