4651156121 has 4 divisors (see below), whose sum is σ = 4727404644. Its totient is φ = 4574907600.

The previous prime is 4651156099. The next prime is 4651156127. The reversal of 4651156121 is 1216511564.

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 2036265625 + 2614890496 = 45125^2 + 51136^2 .

It is a cyclic number.

It is not a de Polignac number, because 4651156121 - 2⁶ = 4651156057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4651156127) 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, 38124170 + ... + 38124291.

It is an arithmetic number, because the mean of its divisors is an integer number (1181851161).

Almost surely, 2^4651156121 is an apocalyptic number.

It is an amenable number.

4651156121 is a deficient number, since it is larger than the sum of its proper divisors (76248523).

4651156121 is an equidigital number, since it uses as much as digits as its factorization.

4651156121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76248522.

The product of its digits is 7200, while the sum is 32.

The square root of 4651156121 is about 68199.3850485472. The cubic root of 4651156121 is about 1669.2458522533.

Adding to 4651156121 its reverse (1216511564), we get a palindrome (5867667685).

The spelling of 4651156121 in words is "four billion, six hundred fifty-one million, one hundred fifty-six thousand, one hundred twenty-one".