67640045929 has 9 divisors (see below), whose sum is σ = 67953844413. Its totient is φ = 67327693452.

The previous prime is 67640045881. The next prime is 67640045947. The reversal of 67640045929 is 92954004676.

The square root of 67640045929 is 260077.

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

It is not a de Polignac number, because 67640045929 - 2¹¹ = 67640043881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67640045989) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73601332 + ... + 73602250.

It is an arithmetic number, because the mean of its divisors is an integer number (7550427157).

Almost surely, 2^67640045929 is an apocalyptic number.

67640045929 is the 260077-th square number.

67640045929 is the 130039-th centered octagonal number.

It is an amenable number.

67640045929 is a deficient number, since it is larger than the sum of its proper divisors (313798484).

67640045929 is an frugal number, since it uses more digits than its factorization.

67640045929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 67640045929 in words is "sixty-seven billion, six hundred forty million, forty-five thousand, nine hundred twenty-nine".