30640721892503 has 2 divisors, whose sum is σ = 30640721892504. Its totient is φ = 30640721892502.

The previous prime is 30640721892461. The next prime is 30640721892523. The reversal of 30640721892503 is 30529812704603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30640721892503 - 2⁸ = 30640721892247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30640721892523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320360946251 + 15320360946252.

It is an arithmetic number, because the mean of its divisors is an integer number (15320360946252).

It is a 1-persistent number, because it is pandigital, but 2⋅30640721892503 = 61281443785006 is not.

Almost surely, 2^{30640721892503} is an apocalyptic number.

30640721892503 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640721892503 is an equidigital number, since it uses as much as digits as its factorization.

30640721892503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 30640721892503 in words is "thirty trillion, six hundred forty billion, seven hundred twenty-one million, eight hundred ninety-two thousand, five hundred three".