87024655478 has 4 divisors (see below), whose sum is σ = 130536983220. Its totient is φ = 43512327738.

The previous prime is 87024655469. The next prime is 87024655583. The reversal of 87024655478 is 87455642078.

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

It is a super-2 number, since 2×87024655478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21756163868 + ... + 21756163871.

It is an arithmetic number, because the mean of its divisors is an integer number (32634245805).

Almost surely, 2^87024655478 is an apocalyptic number.

87024655478 is a deficient number, since it is larger than the sum of its proper divisors (43512327742).

87024655478 is a wasteful number, since it uses less digits than its factorization.

87024655478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43512327741.

The product of its (nonzero) digits is 15052800, while the sum is 56.

The spelling of 87024655478 in words is "eighty-seven billion, twenty-four million, six hundred fifty-five thousand, four hundred seventy-eight".