246621601421 has 4 divisors (see below), whose sum is σ = 265592493852. Its totient is φ = 227650708992.

The previous prime is 246621601409. The next prime is 246621601423. The reversal of 246621601421 is 124106126642.

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 41538516100 + 205083085321 = 203810^2 + 452861^2 .

It is a cyclic number.

It is not a de Polignac number, because 246621601421 - 2¹⁰ = 246621600397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (246621601423) 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, 9485446196 + ... + 9485446221.

It is an arithmetic number, because the mean of its divisors is an integer number (66398123463).

Almost surely, 2^246621601421 is an apocalyptic number.

It is an amenable number.

246621601421 is a deficient number, since it is larger than the sum of its proper divisors (18970892431).

246621601421 is a wasteful number, since it uses less digits than its factorization.

246621601421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18970892430.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 246621601421 in words is "two hundred forty-six billion, six hundred twenty-one million, six hundred one thousand, four hundred twenty-one".