4661751515421 has 48 divisors (see below), whose sum is σ = 8494540262208. Its totient is φ = 2235405312000.

The previous prime is 4661751515401. The next prime is 4661751515483. The reversal of 4661751515421 is 1245151571664.

It is a happy number.

It is not a de Polignac number, because 4661751515421 - 2¹⁵ = 4661751482653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4661751515401) 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 47 ways as a sum of consecutive naturals, for example, 110862180 + ... + 110904221.

It is an arithmetic number, because the mean of its divisors is an integer number (176969588796).

Almost surely, 2^{4661751515421} is an apocalyptic number.

It is an amenable number.

4661751515421 is a deficient number, since it is larger than the sum of its proper divisors (3832788746787).

4661751515421 is a wasteful number, since it uses less digits than its factorization.

4661751515421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221766442 (or 221766435 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 48.

The spelling of 4661751515421 in words is "four trillion, six hundred sixty-one billion, seven hundred fifty-one million, five hundred fifteen thousand, four hundred twenty-one".