10155787321 has 2 divisors, whose sum is σ = 10155787322. Its totient is φ = 10155787320.

The previous prime is 10155787309. The next prime is 10155787339. The reversal of 10155787321 is 12378755101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10119354025 + 36433296 = 100595^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 10155787321 - 2¹¹ = 10155785273 is a prime.

It is a super-2 number, since 2×10155787321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10155787361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5077893660 + 5077893661.

It is an arithmetic number, because the mean of its divisors is an integer number (5077893661).

Almost surely, 2^10155787321 is an apocalyptic number.

It is an amenable number.

10155787321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10155787321 is an equidigital number, since it uses as much as digits as its factorization.

10155787321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 10155787321 in words is "ten billion, one hundred fifty-five million, seven hundred eighty-seven thousand, three hundred twenty-one".