70721135243 has 16 divisors (see below), whose sum is σ = 81696988800. Its totient is φ = 60503836800.

The previous prime is 70721135237. The next prime is 70721135249. The reversal of 70721135243 is 34253112707.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (70721135237) and next prime (70721135249).

It is not a de Polignac number, because 70721135243 - 2⁶ = 70721135179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70721135249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3524108 + ... + 3544118.

It is an arithmetic number, because the mean of its divisors is an integer number (5106061800).

Almost surely, 2^70721135243 is an apocalyptic number.

70721135243 is a deficient number, since it is larger than the sum of its proper divisors (10975853557).

70721135243 is a wasteful number, since it uses less digits than its factorization.

70721135243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38938.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 70721135243 in words is "seventy billion, seven hundred twenty-one million, one hundred thirty-five thousand, two hundred forty-three".