625464472447 has 4 divisors (see below), whose sum is σ = 662256500256. Its totient is φ = 588672444640.

The previous prime is 625464472387. The next prime is 625464472469. The reversal of 625464472447 is 744274464526.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744274464526 = 2 ⋅372137232263.

It is a cyclic number.

It is not a de Polignac number, because 625464472447 - 2³¹ = 623316988799 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 (625464472147) 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, 18396013879 + ... + 18396013912.

It is an arithmetic number, because the mean of its divisors is an integer number (165564125064).

Almost surely, 2^625464472447 is an apocalyptic number.

625464472447 is a deficient number, since it is larger than the sum of its proper divisors (36792027809).

625464472447 is a wasteful number, since it uses less digits than its factorization.

625464472447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36792027808.

The product of its digits is 36126720, while the sum is 55.

The spelling of 625464472447 in words is "six hundred twenty-five billion, four hundred sixty-four million, four hundred seventy-two thousand, four hundred forty-seven".