472455520621657 has 4 divisors (see below), whose sum is σ = 481369775727780. Its totient is φ = 463541265515536.

The previous prime is 472455520621631. The next prime is 472455520621687. The reversal of 472455520621657 is 756126025554274.

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 206863670155536 + 265591850466121 = 14382756^2 + 16296989^2 .

It is a cyclic number.

It is not a de Polignac number, because 472455520621657 - 2¹⁵ = 472455520588889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 472455520621595 and 472455520621604.

It is not an unprimeable number, because it can be changed into a prime (472455520621687) 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, 4457127552982 + ... + 4457127553087.

It is an arithmetic number, because the mean of its divisors is an integer number (120342443931945).

Almost surely, 2^{472455520621657} is an apocalyptic number.

It is an amenable number.

472455520621657 is a deficient number, since it is larger than the sum of its proper divisors (8914255106123).

472455520621657 is an equidigital number, since it uses as much as digits as its factorization.

472455520621657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914255106122.

The product of its (nonzero) digits is 141120000, while the sum is 61.

The spelling of 472455520621657 in words is "four hundred seventy-two trillion, four hundred fifty-five billion, five hundred twenty million, six hundred twenty-one thousand, six hundred fifty-seven".