1501965190721 has 2 divisors, whose sum is σ = 1501965190722. Its totient is φ = 1501965190720.

The previous prime is 1501965190697. The next prime is 1501965190727. The reversal of 1501965190721 is 1270915691051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006540660225 + 495424530496 = 1003265^2 + 703864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1501965190721 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1501965190727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 750982595360 + 750982595361.

It is an arithmetic number, because the mean of its divisors is an integer number (750982595361).

Almost surely, 2^{1501965190721} is an apocalyptic number.

It is an amenable number.

1501965190721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1501965190721 is an equidigital number, since it uses as much as digits as its factorization.

1501965190721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170100, while the sum is 47.

The spelling of 1501965190721 in words is "one trillion, five hundred one billion, nine hundred sixty-five million, one hundred ninety thousand, seven hundred twenty-one".