5651965021 has 16 divisors (see below), whose sum is σ = 5853000384. Its totient is φ = 5454376704.

The previous prime is 5651964973. The next prime is 5651965069. The reversal of 5651965021 is 1205691565.

It is an interprime number because it is at equal distance from previous prime (5651964973) and next prime (5651965069).

It is a cyclic number.

It is not a de Polignac number, because 5651965021 - 2²¹ = 5649867869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5651965621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1990815 + ... + 1993651.

It is an arithmetic number, because the mean of its divisors is an integer number (365812524).

Almost surely, 2^5651965021 is an apocalyptic number.

It is an amenable number.

5651965021 is a deficient number, since it is larger than the sum of its proper divisors (201035363).

5651965021 is a wasteful number, since it uses less digits than its factorization.

5651965021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 5651965021 is about 75179.5518808140. The cubic root of 5651965021 is about 1781.2839514924.

The spelling of 5651965021 in words is "five billion, six hundred fifty-one million, nine hundred sixty-five thousand, twenty-one".