70870461821 has 4 divisors (see below), whose sum is σ = 73951786272. Its totient is φ = 67789137372.

The previous prime is 70870461811. The next prime is 70870461847. The reversal of 70870461821 is 12816407807.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70870461821 - 2¹⁸ = 70870199677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70870461811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540662191 + ... + 1540662236.

It is an arithmetic number, because the mean of its divisors is an integer number (18487946568).

Almost surely, 2^70870461821 is an apocalyptic number.

It is an amenable number.

70870461821 is a deficient number, since it is larger than the sum of its proper divisors (3081324451).

70870461821 is a wasteful number, since it uses less digits than its factorization.

70870461821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081324450.

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 70870461821 in words is "seventy billion, eight hundred seventy million, four hundred sixty-one thousand, eight hundred twenty-one".