625771238401 has 8 divisors (see below), whose sum is σ = 647375103720. Its totient is φ = 604414274688.

The previous prime is 625771238377. The next prime is 625771238419. The reversal of 625771238401 is 104832177526.

It can be written as a sum of positive squares in 4 ways, for example, as 258317046001 + 367454192400 = 508249^2 + 606180^2 .

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 625771238401 - 2⁵ = 625771238369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625771238461) 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, 61720246 + ... + 61730383.

It is an arithmetic number, because the mean of its divisors is an integer number (80921887965).

Almost surely, 2^625771238401 is an apocalyptic number.

It is an amenable number.

625771238401 is a deficient number, since it is larger than the sum of its proper divisors (21603865319).

625771238401 is a wasteful number, since it uses less digits than its factorization.

625771238401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123450803.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 625771238401 in words is "six hundred twenty-five billion, seven hundred seventy-one million, two hundred thirty-eight thousand, four hundred one".