4640021445 has 48 divisors (see below), whose sum is σ = 8047451520. Its totient is φ = 2280970368.

The previous prime is 4640021437. The next prime is 4640021461. The reversal of 4640021445 is 5441200464.

It is a happy number.

It is not a de Polignac number, because 4640021445 - 2³ = 4640021437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 188776 + ... + 211934.

It is an arithmetic number, because the mean of its divisors is an integer number (167655240).

Almost surely, 2^4640021445 is an apocalyptic number.

It is an amenable number.

4640021445 is a deficient number, since it is larger than the sum of its proper divisors (3407430075).

4640021445 is a wasteful number, since it uses less digits than its factorization.

4640021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23242 (or 23223 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 4640021445 is about 68117.7028752438. The cubic root of 4640021445 is about 1667.9127526408.

The spelling of 4640021445 in words is "four billion, six hundred forty million, twenty-one thousand, four hundred forty-five".