7549138356 has 24 divisors (see below), whose sum is σ = 17625011040. Its totient is φ = 2514900192.

The previous prime is 7549138309. The next prime is 7549138357. The reversal of 7549138356 is 6538319457.

It is a junction number, because it is equal to n+sod(n) for n = 7549138299 and 7549138308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7549138357) 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 7 ways as a sum of consecutive naturals, for example, 163546 + ... + 204561.

It is an arithmetic number, because the mean of its divisors is an integer number (734375460).

Almost surely, 2^7549138356 is an apocalyptic number.

It is an amenable number.

7549138356 is an abundant number, since it is smaller than the sum of its proper divisors (10075872684).

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

7549138356 is a wasteful number, since it uses less digits than its factorization.

7549138356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369823 (or 369821 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The square root of 7549138356 is about 86885.7776393812. Note that the first 3 decimals coincide. The cubic root of 7549138356 is about 1961.6994108071.

The spelling of 7549138356 in words is "seven billion, five hundred forty-nine million, one hundred thirty-eight thousand, three hundred fifty-six".