4006621287055 has 4 divisors (see below), whose sum is σ = 4807945544472. Its totient is φ = 3205297029640.

The previous prime is 4006621286981. The next prime is 4006621287061. The reversal of 4006621287055 is 5507821266004.

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

It is not a de Polignac number, because 4006621287055 - 2¹⁵ = 4006621254287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4006621286996 and 4006621287014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400662128701 + ... + 400662128710.

It is an arithmetic number, because the mean of its divisors is an integer number (1201986386118).

Almost surely, 2^{4006621287055} is an apocalyptic number.

4006621287055 is a deficient number, since it is larger than the sum of its proper divisors (801324257417).

4006621287055 is an equidigital number, since it uses as much as digits as its factorization.

4006621287055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801324257416.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 4006621287055 in words is "four trillion, six billion, six hundred twenty-one million, two hundred eighty-seven thousand, fifty-five".