1530623401261 has 2 divisors, whose sum is σ = 1530623401262. Its totient is φ = 1530623401260.

The previous prime is 1530623401187. The next prime is 1530623401291. The reversal of 1530623401261 is 1621043260351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 974032798761 + 556590602500 = 986931^2 + 746050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1530623401261 - 2⁹ = 1530623400749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1530623401291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765311700630 + 765311700631.

It is an arithmetic number, because the mean of its divisors is an integer number (765311700631).

Almost surely, 2^{1530623401261} is an apocalyptic number.

It is an amenable number.

1530623401261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530623401261 is an equidigital number, since it uses as much as digits as its factorization.

1530623401261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1530623401261 in words is "one trillion, five hundred thirty billion, six hundred twenty-three million, four hundred one thousand, two hundred sixty-one".