70016864449 has 27 divisors (see below), whose sum is σ = 82471341537. Its totient is φ = 59269851144.

The previous prime is 70016864429. The next prime is 70016864459. The reversal of 70016864449 is 94446861007.

The square root of 70016864449 is 264607.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 70016864449 - 2¹¹ = 70016862401 is a prime.

It is a super-2 number, since 2×70016864449² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70016864429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 190781464 + ... + 190781830.

It is an arithmetic number, because the mean of its divisors is an integer number (3054494131).

Almost surely, 2^70016864449 is an apocalyptic number.

70016864449 is the 264607-th square number.

70016864449 is the 132304-th centered octagonal number.

It is an amenable number.

70016864449 is a deficient number, since it is larger than the sum of its proper divisors (12454477088).

70016864449 is an frugal number, since it uses more digits than its factorization.

70016864449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

Multiplying 70016864449 by its sum of digits (49), we get a square (3430826358001 = 1852249²).

70016864449 divided by its sum of digits (49) gives a square (1428915601 = 37801²).

The spelling of 70016864449 in words is "seventy billion, sixteen million, eight hundred sixty-four thousand, four hundred forty-nine".