4640158258121 has 4 divisors (see below), whose sum is σ = 4681221605652. Its totient is φ = 4599094910592.

The previous prime is 4640158258117. The next prime is 4640158258207. The reversal of 4640158258121 is 1218528510464.

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 538058925625 + 4102099332496 = 733525^2 + 2025364^2 .

It is a cyclic number.

It is not a de Polignac number, because 4640158258121 - 2² = 4640158258117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4640158258321) 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, 20531673596 + ... + 20531673821.

It is an arithmetic number, because the mean of its divisors is an integer number (1170305401413).

Almost surely, 2^{4640158258121} is an apocalyptic number.

It is an amenable number.

4640158258121 is a deficient number, since it is larger than the sum of its proper divisors (41063347531).

4640158258121 is a wasteful number, since it uses less digits than its factorization.

4640158258121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41063347530.

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 4640158258121 in words is "four trillion, six hundred forty billion, one hundred fifty-eight million, two hundred fifty-eight thousand, one hundred twenty-one".