1388949747158 has 4 divisors (see below), whose sum is σ = 2083424620740. Its totient is φ = 694474873578.

The previous prime is 1388949747137. The next prime is 1388949747167. The reversal of 1388949747158 is 8517479498831.

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

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 as a sum of consecutive naturals, namely, 347237436788 + ... + 347237436791.

It is an arithmetic number, because the mean of its divisors is an integer number (520856155185).

Almost surely, 2^{1388949747158} is an apocalyptic number.

1388949747158 is a deficient number, since it is larger than the sum of its proper divisors (694474873582).

1388949747158 is an equidigital number, since it uses as much as digits as its factorization.

1388949747158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694474873581.

The product of its digits is 487710720, while the sum is 74.

The spelling of 1388949747158 in words is "one trillion, three hundred eighty-eight billion, nine hundred forty-nine million, seven hundred forty-seven thousand, one hundred fifty-eight".