70145025449 has 18 divisors (see below), whose sum is σ = 72978346350. Its totient is φ = 67418606080.

The previous prime is 70145025409. The next prime is 70145025451. The reversal of 70145025449 is 94452054107.

It can be written as a sum of positive squares in 3 ways, for example, as 14563662400 + 55581363049 = 120680^2 + 235757^2 .

It is a de Polignac number, because none of the positive numbers 2^k-70145025449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70145025409) 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, 156224777 + ... + 156225225.

It is an arithmetic number, because the mean of its divisors is an integer number (4054352575).

Almost surely, 2^70145025449 is an apocalyptic number.

It is an amenable number.

70145025449 is a deficient number, since it is larger than the sum of its proper divisors (2833320901).

70145025449 is an frugal number, since it uses more digits than its factorization.

70145025449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 909 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 70145025449 in words is "seventy billion, one hundred forty-five million, twenty-five thousand, four hundred forty-nine".