7072545538 has 4 divisors (see below), whose sum is σ = 10608818310. Its totient is φ = 3536272768.

The previous prime is 7072545511. The next prime is 7072545589. The reversal of 7072545538 is 8355452707.

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

It can be written as a sum of positive squares in only one way, i.e., 6965070849 + 107474689 = 83457^2 + 10367^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1768136383 + ... + 1768136386.

Almost surely, 2^7072545538 is an apocalyptic number.

7072545538 is a deficient number, since it is larger than the sum of its proper divisors (3536272772).

7072545538 is a wasteful number, since it uses less digits than its factorization.

7072545538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536272771.

The product of its (nonzero) digits is 1176000, while the sum is 46.

The square root of 7072545538 is about 84098.4276785244. The cubic root of 7072545538 is about 1919.5167998819.

The spelling of 7072545538 in words is "seven billion, seventy-two million, five hundred forty-five thousand, five hundred thirty-eight".