70729620705 has 48 divisors (see below), whose sum is σ = 122959396560. Its totient is φ = 37611454464.

The previous prime is 70729620683. The next prime is 70729620713. The reversal of 70729620705 is 50702692707.

It can be written as a sum of positive squares in 8 ways, for example, as 18563517504 + 52166103201 = 136248^2 + 228399^2 .

It is not a de Polignac number, because 70729620705 - 2⁹ = 70729620193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41776839 + ... + 41778531.

It is an arithmetic number, because the mean of its divisors is an integer number (2561654095).

Almost surely, 2^70729620705 is an apocalyptic number.

It is an amenable number.

70729620705 is a deficient number, since it is larger than the sum of its proper divisors (52229775855).

70729620705 is a wasteful number, since it uses less digits than its factorization.

70729620705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3890 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The spelling of 70729620705 in words is "seventy billion, seven hundred twenty-nine million, six hundred twenty thousand, seven hundred five".