1650265861 has 2 divisors, whose sum is σ = 1650265862. Its totient is φ = 1650265860.

The previous prime is 1650265787. The next prime is 1650265891. The reversal of 1650265861 is 1685620561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1505905636 + 144360225 = 38806^2 + 12015^2 .

It is an emirp because it is prime and its reverse (1685620561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1650265861 - 2⁷ = 1650265733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1650265891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825132930 + 825132931.

It is an arithmetic number, because the mean of its divisors is an integer number (825132931).

Almost surely, 2^1650265861 is an apocalyptic number.

It is an amenable number.

1650265861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650265861 is an equidigital number, since it uses as much as digits as its factorization.

1650265861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 1650265861 is about 40623.4644140551. The cubic root of 1650265861 is about 1181.7292134910.

The spelling of 1650265861 in words is "one billion, six hundred fifty million, two hundred sixty-five thousand, eight hundred sixty-one".