70731610221751 has 2 divisors, whose sum is σ = 70731610221752. Its totient is φ = 70731610221750.

The previous prime is 70731610221743. The next prime is 70731610221889. The reversal of 70731610221751 is 15712201613707.

It is a weak prime.

It is an emirp because it is prime and its reverse (15712201613707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70731610221751 - 2³ = 70731610221743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70731610221698 and 70731610221707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70731610225751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35365805110875 + 35365805110876.

It is an arithmetic number, because the mean of its divisors is an integer number (35365805110876).

Almost surely, 2^{70731610221751} is an apocalyptic number.

70731610221751 is a deficient number, since it is larger than the sum of its proper divisors (1).

70731610221751 is an equidigital number, since it uses as much as digits as its factorization.

70731610221751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 70731610221751 in words is "seventy trillion, seven hundred thirty-one billion, six hundred ten million, two hundred twenty-one thousand, seven hundred fifty-one".