70643504450 has 48 divisors (see below), whose sum is σ = 131848659360. Its totient is φ = 28160421120.

The previous prime is 70643504431. The next prime is 70643504497. The reversal of 70643504450 is 5440534607.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28727321 + ... + 28729779.

It is an arithmetic number, because the mean of its divisors is an integer number (2746847070).

Almost surely, 2^70643504450 is an apocalyptic number.

70643504450 is a deficient number, since it is larger than the sum of its proper divisors (61205154910).

70643504450 is a wasteful number, since it uses less digits than its factorization.

70643504450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 38.

The spelling of 70643504450 in words is "seventy billion, six hundred forty-three million, five hundred four thousand, four hundred fifty".