7149546138 has 64 divisors (see below), whose sum is σ = 17222400000. Its totient is φ = 1932911424.

The previous prime is 7149546137. The next prime is 7149546161. The reversal of 7149546138 is 8316459417.

It is a super-2 number, since 2×7149546138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7149546137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728488 + ... + 738236.

It is an arithmetic number, because the mean of its divisors is an integer number (269100000).

Almost surely, 2^7149546138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7149546138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8611200000).

7149546138 is an abundant number, since it is smaller than the sum of its proper divisors (10072853862).

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

7149546138 is a wasteful number, since it uses less digits than its factorization.

7149546138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10699.

The product of its digits is 725760, while the sum is 48.

The square root of 7149546138 is about 84554.9888415817. The cubic root of 7149546138 is about 1926.4577601757.

The spelling of 7149546138 in words is "seven billion, one hundred forty-nine million, five hundred forty-six thousand, one hundred thirty-eight".