748263251138 has 18 divisors (see below), whose sum is σ = 1215400165497. Its totient is φ = 345344929800.

The previous prime is 748263251129. The next prime is 748263251143. The reversal of 748263251138 is 831152362847.

It can be written as a sum of positive squares in 2 ways, for example, as 639787217689 + 108476033449 = 799867^2 + 329357^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=611663.

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 15879713 + ... + 15926763.

Almost surely, 2^748263251138 is an apocalyptic number.

748263251138 is a deficient number, since it is larger than the sum of its proper divisors (467136914359).

748263251138 is an frugal number, since it uses more digits than its factorization.

748263251138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94130 (or 47066 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

Multiplying 748263251138 by its sum of digits (50), we get a square (37413162556900 = 6116630²).

The spelling of 748263251138 in words is "seven hundred forty-eight billion, two hundred sixty-three million, two hundred fifty-one thousand, one hundred thirty-eight".