100142347878 has 12 divisors (see below), whose sum is σ = 216975087108. Its totient is φ = 33380782620.

The previous prime is 100142347867. The next prime is 100142347897. The reversal of 100142347878 is 878743241001.

100142347878 is a `hidden beast` number, since 100 + 1 + 4 + 2 + 3 + 478 + 78 = 666.

It is a super-2 number, since 2×100142347878² (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 in 5 ways as a sum of consecutive naturals, for example, 2781731868 + ... + 2781731903.

It is an arithmetic number, because the mean of its divisors is an integer number (18081257259).

Almost surely, 2^100142347878 is an apocalyptic number.

100142347878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

100142347878 is an abundant number, since it is smaller than the sum of its proper divisors (116832739230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100142347878 is a wasteful number, since it uses less digits than its factorization.

100142347878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563463779 (or 5563463776 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

Adding to 100142347878 its reverse (878743241001), we get a palindrome (978885588879).

The spelling of 100142347878 in words is "one hundred billion, one hundred forty-two million, three hundred forty-seven thousand, eight hundred seventy-eight".