3750133890521 has 4 divisors (see below), whose sum is σ = 3775302574500. Its totient is φ = 3724965206544.

The previous prime is 3750133890511. The next prime is 3750133890527. The reversal of 3750133890521 is 1250983310573.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1390361706496 + 2359772184025 = 1179136^2 + 1536155^2 .

It is a cyclic number.

It is not a de Polignac number, because 3750133890521 - 2⁶ = 3750133890457 is a prime.

It is a super-2 number, since 2×3750133890521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3750133890527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12584341766 + ... + 12584342063.

It is an arithmetic number, because the mean of its divisors is an integer number (943825643625).

Almost surely, 2^{3750133890521} is an apocalyptic number.

It is an amenable number.

3750133890521 is a deficient number, since it is larger than the sum of its proper divisors (25168683979).

3750133890521 is a wasteful number, since it uses less digits than its factorization.

3750133890521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25168683978.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 3750133890521 in words is "three trillion, seven hundred fifty billion, one hundred thirty-three million, eight hundred ninety thousand, five hundred twenty-one".