477721641 has 16 divisors (see below), whose sum is σ = 678737664. Its totient is φ = 297832704.

The previous prime is 477721639. The next prime is 477721649. The reversal of 477721641 is 146127774.

It is not a de Polignac number, because 477721641 - 2¹ = 477721639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 477721641.

It is not an unprimeable number, because it can be changed into a prime (477721649) 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, 21825 + ... + 37838.

It is an arithmetic number, because the mean of its divisors is an integer number (42421104).

Almost surely, 2^477721641 is an apocalyptic number.

It is an amenable number.

477721641 is a deficient number, since it is larger than the sum of its proper divisors (201016023).

477721641 is a wasteful number, since it uses less digits than its factorization.

477721641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59840.

The product of its digits is 65856, while the sum is 39.

The square root of 477721641 is about 21856.8442598651. The cubic root of 477721641 is about 781.7327471793.

The spelling of 477721641 in words is "four hundred seventy-seven million, seven hundred twenty-one thousand, six hundred forty-one".