678788005287 has 32 divisors (see below), whose sum is σ = 1105639879680. Its totient is φ = 361965415680.

The previous prime is 678788005267. The next prime is 678788005307. The reversal of 678788005287 is 782500887876.

It is an interprime number because it is at equal distance from previous prime (678788005267) and next prime (678788005307).

It is not a de Polignac number, because 678788005287 - 2²⁰ = 678786956711 is a prime.

It is a super-2 number, since 2×678788005287² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678788005267) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17118712 + ... + 17158317.

It is an arithmetic number, because the mean of its divisors is an integer number (34551246240).

Almost surely, 2^678788005287 is an apocalyptic number.

678788005287 is a deficient number, since it is larger than the sum of its proper divisors (426851874393).

678788005287 is a wasteful number, since it uses less digits than its factorization.

678788005287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34277103.

The product of its (nonzero) digits is 84295680, while the sum is 66.

The spelling of 678788005287 in words is "six hundred seventy-eight billion, seven hundred eighty-eight million, five thousand, two hundred eighty-seven".