6215551885 has 16 divisors (see below), whose sum is σ = 7499796480. Its totient is φ = 4945096960.

The previous prime is 6215551879. The next prime is 6215551889. The reversal of 6215551885 is 5881555126.

It is not a de Polignac number, because 6215551885 - 2¹⁹ = 6215027597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6215551889) 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, 682965 + ... + 692005.

It is an arithmetic number, because the mean of its divisors is an integer number (468737280).

Almost surely, 2^6215551885 is an apocalyptic number.

It is an amenable number.

6215551885 is a deficient number, since it is larger than the sum of its proper divisors (1284244595).

6215551885 is a wasteful number, since it uses less digits than its factorization.

6215551885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788.

The product of its digits is 480000, while the sum is 46.

The square root of 6215551885 is about 78838.7714579572. The cubic root of 6215551885 is about 1838.6253008738.

The spelling of 6215551885 in words is "six billion, two hundred fifteen million, five hundred fifty-one thousand, eight hundred eighty-five".