70420363861 has 4 divisors (see below), whose sum is σ = 72848652300. Its totient is φ = 67992075424.

The previous prime is 70420363847. The next prime is 70420363889. The reversal of 70420363861 is 16836302407.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41848884900 + 28571478961 = 204570^2 + 169031^2 .

It is a cyclic number.

It is not a de Polignac number, because 70420363861 - 2¹³ = 70420355669 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 (70420363801) 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, 1214144176 + ... + 1214144233.

It is an arithmetic number, because the mean of its divisors is an integer number (18212163075).

Almost surely, 2^70420363861 is an apocalyptic number.

It is an amenable number.

70420363861 is a deficient number, since it is larger than the sum of its proper divisors (2428288439).

70420363861 is a wasteful number, since it uses less digits than its factorization.

70420363861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428288438.

The product of its (nonzero) digits is 145152, while the sum is 40.

It can be divided in two parts, 70420 and 363861, that added together give a square (434281 = 659²).

The spelling of 70420363861 in words is "seventy billion, four hundred twenty million, three hundred sixty-three thousand, eight hundred sixty-one".