70740455645 has 4 divisors (see below), whose sum is σ = 84888546780. Its totient is φ = 56592364512.

The previous prime is 70740455629. The next prime is 70740455671. The reversal of 70740455645 is 54655404707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54655404707 = 3323 ⋅16447609.

It can be written as a sum of positive squares in 2 ways, for example, as 52329765049 + 18410690596 = 228757^2 + 135686^2 .

It is a cyclic number.

It is not a de Polignac number, because 70740455645 - 2⁴ = 70740455629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70740455645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7074045560 + ... + 7074045569.

It is an arithmetic number, because the mean of its divisors is an integer number (21222136695).

Almost surely, 2^70740455645 is an apocalyptic number.

It is an amenable number.

70740455645 is a deficient number, since it is larger than the sum of its proper divisors (14148091135).

70740455645 is a wasteful number, since it uses less digits than its factorization.

70740455645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14148091134.

The product of its (nonzero) digits is 2352000, while the sum is 47.

The spelling of 70740455645 in words is "seventy billion, seven hundred forty million, four hundred fifty-five thousand, six hundred forty-five".