420736642261 has 8 divisors (see below), whose sum is σ = 453192475064. Its totient is φ = 388293877440.

The previous prime is 420736642241. The next prime is 420736642373. The reversal of 420736642261 is 162246637024.

It can be written as a sum of positive squares in 4 ways, for example, as 34139952900 + 386596689361 = 184770^2 + 621769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420736642261 - 2²³ = 420728253653 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 (420736642241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3200070 + ... + 3328951.

It is an arithmetic number, because the mean of its divisors is an integer number (56649059383).

Almost surely, 2^420736642261 is an apocalyptic number.

It is an amenable number.

420736642261 is a deficient number, since it is larger than the sum of its proper divisors (32455832803).

420736642261 is a wasteful number, since it uses less digits than its factorization.

420736642261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6533991.

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 420736642261 in words is "four hundred twenty billion, seven hundred thirty-six million, six hundred forty-two thousand, two hundred sixty-one".