748578949639 has 4 divisors (see below), whose sum is σ = 749600204056. Its totient is φ = 747557695224.

The previous prime is 748578949631. The next prime is 748578949667. The reversal of 748578949639 is 936949875847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936949875847 = 358847 ⋅2611001.

It is a cyclic number.

It is not a de Polignac number, because 748578949639 - 2³ = 748578949631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748578949631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510626109 + ... + 510627574.

It is an arithmetic number, because the mean of its divisors is an integer number (187400051014).

Almost surely, 2^748578949639 is an apocalyptic number.

748578949639 is a deficient number, since it is larger than the sum of its proper divisors (1021254417).

748578949639 is a wasteful number, since it uses less digits than its factorization.

748578949639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021254416.

The product of its digits is 3292047360, while the sum is 79.

The spelling of 748578949639 in words is "seven hundred forty-eight billion, five hundred seventy-eight million, nine hundred forty-nine thousand, six hundred thirty-nine".