102687199787278 has 16 divisors (see below), whose sum is σ = 155951180743680. Its totient is φ = 50707340710200.

The previous prime is 102687199787257. The next prime is 102687199787287. The reversal of 102687199787278 is 872787991786201.

It is a super-2 number, since 2×102687199787278² (a number of 29 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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966906108 + ... + 967012303.

It is an arithmetic number, because the mean of its divisors is an integer number (9746948796480).

Almost surely, 2^{102687199787278} is an apocalyptic number.

102687199787278 is a deficient number, since it is larger than the sum of its proper divisors (53263980956402).

102687199787278 is a wasteful number, since it uses less digits than its factorization.

102687199787278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933918743.

The product of its (nonzero) digits is 2389782528, while the sum is 82.

The spelling of 102687199787278 in words is "one hundred two trillion, six hundred eighty-seven billion, one hundred ninety-nine million, seven hundred eighty-seven thousand, two hundred seventy-eight".