4651536621 has 4 divisors (see below), whose sum is σ = 6202048832. Its totient is φ = 3101024412.

The previous prime is 4651536619. The next prime is 4651536641. The reversal of 4651536621 is 1266351564.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4651536621 - 2¹ = 4651536619 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4651536621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4651536641) 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, 775256101 + ... + 775256106.

It is an arithmetic number, because the mean of its divisors is an integer number (1550512208).

Almost surely, 2^4651536621 is an apocalyptic number.

It is an amenable number.

4651536621 is a deficient number, since it is larger than the sum of its proper divisors (1550512211).

4651536621 is a wasteful number, since it uses less digits than its factorization.

4651536621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550512210.

The product of its digits is 129600, while the sum is 39.

The square root of 4651536621 is about 68202.1746060930. The cubic root of 4651536621 is about 1669.2913700207.

The spelling of 4651536621 in words is "four billion, six hundred fifty-one million, five hundred thirty-six thousand, six hundred twenty-one".