102767638391 has 4 divisors (see below), whose sum is σ = 112110150984. Its totient is φ = 93425125800.

The previous prime is 102767638331. The next prime is 102767638403. The reversal of 102767638391 is 193836767201.

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

It is a cyclic number.

It is not a de Polignac number, because 102767638391 - 2¹⁰ = 102767637367 is a prime.

It is a super-2 number, since 2×102767638391² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102767638331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4671256280 + ... + 4671256301.

It is an arithmetic number, because the mean of its divisors is an integer number (28027537746).

Almost surely, 2^102767638391 is an apocalyptic number.

102767638391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102767638391 is a deficient number, since it is larger than the sum of its proper divisors (9342512593).

102767638391 is an equidigital number, since it uses as much as digits as its factorization.

102767638391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342512592.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 102767638391 in words is "one hundred two billion, seven hundred sixty-seven million, six hundred thirty-eight thousand, three hundred ninety-one".