4745161621421 has 16 divisors (see below), whose sum is σ = 5229193998336. Its totient is φ = 4278139056576.

The previous prime is 4745161621373. The next prime is 4745161621429. The reversal of 4745161621421 is 1241261615474.

It is a cyclic number.

It is not a de Polignac number, because 4745161621421 - 2⁶ = 4745161621357 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4745161621429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18331331 + ... + 18588383.

It is an arithmetic number, because the mean of its divisors is an integer number (326824624896).

Almost surely, 2^{4745161621421} is an apocalyptic number.

It is an amenable number.

4745161621421 is a deficient number, since it is larger than the sum of its proper divisors (484032376915).

4745161621421 is a wasteful number, since it uses less digits than its factorization.

4745161621421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290132.

The product of its digits is 322560, while the sum is 44.

The spelling of 4745161621421 in words is "four trillion, seven hundred forty-five billion, one hundred sixty-one million, six hundred twenty-one thousand, four hundred twenty-one".