70528444549 has 18 divisors (see below), whose sum is σ = 73754689554. Its totient is φ = 67423868640.

The previous prime is 70528444513. The next prime is 70528444589. The reversal of 70528444549 is 94544482507.

It can be written as a sum of positive squares in 3 ways, for example, as 19002622500 + 51525822049 = 137850^2 + 226993^2 .

It is not a de Polignac number, because 70528444549 - 2²⁵ = 70494890117 is a prime.

It is a super-2 number, since 2×70528444549² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70528444496 and 70528444505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70528444589) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 76744312 + ... + 76745230.

It is an arithmetic number, because the mean of its divisors is an integer number (4097482753).

Almost surely, 2^70528444549 is an apocalyptic number.

It is an amenable number.

70528444549 is a deficient number, since it is larger than the sum of its proper divisors (3226245005).

70528444549 is an frugal number, since it uses more digits than its factorization.

70528444549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 52.

The spelling of 70528444549 in words is "seventy billion, five hundred twenty-eight million, four hundred forty-four thousand, five hundred forty-nine".