1625216741 has 2 divisors, whose sum is σ = 1625216742. Its totient is φ = 1625216740.

The previous prime is 1625216729. The next prime is 1625216759. The reversal of 1625216741 is 1476125261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1053002500 + 572214241 = 32450^2 + 23921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1625216741 is a prime.

It is a super-2 number, since 2×1625216741² = 5282658910453322162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1625216701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 812608370 + 812608371.

It is an arithmetic number, because the mean of its divisors is an integer number (812608371).

Almost surely, 2^1625216741 is an apocalyptic number.

It is an amenable number.

1625216741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1625216741 is an equidigital number, since it uses as much as digits as its factorization.

1625216741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 1625216741 is about 40313.9769930976. The cubic root of 1625216741 is about 1175.7196113450.

The spelling of 1625216741 in words is "one billion, six hundred twenty-five million, two hundred sixteen thousand, seven hundred forty-one".