87204840278 has 4 divisors (see below), whose sum is σ = 130807260420. Its totient is φ = 43602420138.

The previous prime is 87204840241. The next prime is 87204840293.

87204840278 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×87204840278² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21801210068 + ... + 21801210071.

It is an arithmetic number, because the mean of its divisors is an integer number (32701815105).

Almost surely, 2^87204840278 is an apocalyptic number.

87204840278 is a deficient number, since it is larger than the sum of its proper divisors (43602420142).

87204840278 is a wasteful number, since it uses less digits than its factorization.

87204840278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43602420141.

The product of its (nonzero) digits is 1605632, while the sum is 50.

The spelling of 87204840278 in words is "eighty-seven billion, two hundred four million, eight hundred forty thousand, two hundred seventy-eight".