625445501 has 2 divisors, whose sum is σ = 625445502. Its totient is φ = 625445500.

The previous prime is 625445467. The next prime is 625445503. The reversal of 625445501 is 105544526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622452601 + 2992900 = 24949^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 625445501 - 2¹⁴ = 625429117 is a prime.

It is a super-2 number, since 2×625445501² = 782364149442282002, which contains 22 as substring.

Together with 625445503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625445503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312722750 + 312722751.

It is an arithmetic number, because the mean of its divisors is an integer number (312722751).

Almost surely, 2^625445501 is an apocalyptic number.

It is an amenable number.

625445501 is a deficient number, since it is larger than the sum of its proper divisors (1).

625445501 is an equidigital number, since it uses as much as digits as its factorization.

625445501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 625445501 is about 25008.9084327965. The cubic root of 625445501 is about 855.1910706884.

The spelling of 625445501 in words is "six hundred twenty-five million, four hundred forty-five thousand, five hundred one".