10138942278 has 12 divisors (see below), whose sum is σ = 21967708308. Its totient is φ = 3379647420.

The previous prime is 10138942277. The next prime is 10138942361. The reversal of 10138942278 is 87224983101.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10138942277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281637268 + ... + 281637303.

It is an arithmetic number, because the mean of its divisors is an integer number (1830642359).

Almost surely, 2^10138942278 is an apocalyptic number.

10138942278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10138942278 is an abundant number, since it is smaller than the sum of its proper divisors (11828766030).

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

10138942278 is a wasteful number, since it uses less digits than its factorization.

10138942278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563274579 (or 563274576 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 10138942278 in words is "ten billion, one hundred thirty-eight million, nine hundred forty-two thousand, two hundred seventy-eight".