1625511061 has 2 divisors, whose sum is σ = 1625511062. Its totient is φ = 1625511060.

The previous prime is 1625511023. The next prime is 1625511119. The reversal of 1625511061 is 1601155261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1149616836 + 475894225 = 33906^2 + 21815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625511061 - 2²⁷ = 1491293333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625521061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812755530 + 812755531.

It is an arithmetic number, because the mean of its divisors is an integer number (812755531).

Almost surely, 2^1625511061 is an apocalyptic number.

It is an amenable number.

1625511061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625511061 is an equidigital number, since it uses as much as digits as its factorization.

1625511061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1625511061 is about 40317.6271747235. The cubic root of 1625511061 is about 1175.7905797069.

The spelling of 1625511061 in words is "one billion, six hundred twenty-five million, five hundred eleven thousand, sixty-one".