53625621949 has 2 divisors, whose sum is σ = 53625621950. Its totient is φ = 53625621948.

The previous prime is 53625621887. The next prime is 53625621979. The reversal of 53625621949 is 94912652635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50734409049 + 2891212900 = 225243^2 + 53770^2 .

It is a cyclic number.

It is not a de Polignac number, because 53625621949 - 2¹⁵ = 53625589181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53625621896 and 53625621905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53625621979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26812810974 + 26812810975.

It is an arithmetic number, because the mean of its divisors is an integer number (26812810975).

Almost surely, 2^53625621949 is an apocalyptic number.

It is an amenable number.

53625621949 is a deficient number, since it is larger than the sum of its proper divisors (1).

53625621949 is an equidigital number, since it uses as much as digits as its factorization.

53625621949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The spelling of 53625621949 in words is "fifty-three billion, six hundred twenty-five million, six hundred twenty-one thousand, nine hundred forty-nine".