3551845538 has 4 divisors (see below), whose sum is σ = 5327768310. Its totient is φ = 1775922768.

The previous prime is 3551845523. The next prime is 3551845567. The reversal of 3551845538 is 8355481553.

It is a happy number.

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., 2661837649 + 890007889 = 51593^2 + 29833^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3551845492 and 3551845501.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 887961383 + ... + 887961386.

Almost surely, 2^3551845538 is an apocalyptic number.

3551845538 is a deficient number, since it is larger than the sum of its proper divisors (1775922772).

3551845538 is a wasteful number, since it uses less digits than its factorization.

3551845538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775922771.

The product of its digits is 1440000, while the sum is 47.

The square root of 3551845538 is about 59597.3618375847. The cubic root of 3551845538 is about 1525.7546082468.

The spelling of 3551845538 in words is "three billion, five hundred fifty-one million, eight hundred forty-five thousand, five hundred thirty-eight".