70726427645 has 4 divisors (see below), whose sum is σ = 84871713180. Its totient is φ = 56581142112.

The previous prime is 70726427591. The next prime is 70726427669. The reversal of 70726427645 is 54672462707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54672462707 = 1553 ⋅35204419.

It can be written as a sum of positive squares in 2 ways, for example, as 34648844164 + 36077583481 = 186142^2 + 189941^2 .

It is a cyclic number.

It is not a de Polignac number, because 70726427645 - 2¹⁸ = 70726165501 is a prime.

It is a super-3 number, since 3×70726427645³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70726427593 and 70726427602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7072642760 + ... + 7072642769.

It is an arithmetic number, because the mean of its divisors is an integer number (21217928295).

Almost surely, 2^70726427645 is an apocalyptic number.

It is an amenable number.

70726427645 is a deficient number, since it is larger than the sum of its proper divisors (14145285535).

70726427645 is a wasteful number, since it uses less digits than its factorization.

70726427645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14145285534.

The product of its (nonzero) digits is 3951360, while the sum is 50.

The spelling of 70726427645 in words is "seventy billion, seven hundred twenty-six million, four hundred twenty-seven thousand, six hundred forty-five".