4540646400121 has 4 divisors (see below), whose sum is σ = 4889926892452. Its totient is φ = 4191365907792.

The previous prime is 4540646400119. The next prime is 4540646400137. The reversal of 4540646400121 is 1210046460454.

It is a happy number.

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 2725668921600 + 1814977478521 = 1650960^2 + 1347211^2 .

It is a cyclic number.

It is not a de Polignac number, because 4540646400121 - 2¹ = 4540646400119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4540646400181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174640246146 + ... + 174640246171.

It is an arithmetic number, because the mean of its divisors is an integer number (1222481723113).

Almost surely, 2^{4540646400121} is an apocalyptic number.

It is an amenable number.

4540646400121 is a deficient number, since it is larger than the sum of its proper divisors (349280492331).

4540646400121 is a wasteful number, since it uses less digits than its factorization.

4540646400121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349280492330.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 4540646400121 in words is "four trillion, five hundred forty billion, six hundred forty-six million, four hundred thousand, one hundred twenty-one".