6858450220429 has 4 divisors (see below), whose sum is σ = 7025729494140. Its totient is φ = 6691170946720.

The previous prime is 6858450220409. The next prime is 6858450220441. The reversal of 6858450220429 is 9240220548586.

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 2610308766025 + 4248141454404 = 1615645^2 + 2061102^2 .

It is a cyclic number.

It is not a de Polignac number, because 6858450220429 - 2²¹ = 6858448123277 is a prime.

It is a super-2 number, since 2×6858450220429² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6858450220429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6858450220409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83639636794 + ... + 83639636875.

It is an arithmetic number, because the mean of its divisors is an integer number (1756432373535).

Almost surely, 2^{6858450220429} is an apocalyptic number.

It is an amenable number.

6858450220429 is a deficient number, since it is larger than the sum of its proper divisors (167279273711).

6858450220429 is a wasteful number, since it uses less digits than its factorization.

6858450220429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167279273710.

The product of its (nonzero) digits is 11059200, while the sum is 55.

The spelling of 6858450220429 in words is "six trillion, eight hundred fifty-eight billion, four hundred fifty million, two hundred twenty thousand, four hundred twenty-nine".