4051545621 has 48 divisors (see below), whose sum is σ = 6007336704. Its totient is φ = 2425752576.

The previous prime is 4051545593. The next prime is 4051545629. The reversal of 4051545621 is 1265451504.

It is not a de Polignac number, because 4051545621 - 2⁶ = 4051545557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4051545629) 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 47 ways as a sum of consecutive naturals, for example, 1698996 + ... + 1701378.

It is an arithmetic number, because the mean of its divisors is an integer number (125152848).

Almost surely, 2^4051545621 is an apocalyptic number.

It is an amenable number.

4051545621 is a deficient number, since it is larger than the sum of its proper divisors (1955791083).

4051545621 is a wasteful number, since it uses less digits than its factorization.

4051545621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 4051545621 is about 63651.7526938575. The cubic root of 4051545621 is about 1594.1906017373.

The spelling of 4051545621 in words is "four billion, fifty-one million, five hundred forty-five thousand, six hundred twenty-one".