6221551654 has 4 divisors (see below), whose sum is σ = 9332327484. Its totient is φ = 3110775826.

The previous prime is 6221551639. The next prime is 6221551657. The reversal of 6221551654 is 4561551226.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6221551657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555387912 + ... + 1555387915.

It is an arithmetic number, because the mean of its divisors is an integer number (2333081871).

Almost surely, 2^6221551654 is an apocalyptic number.

6221551654 is a deficient number, since it is larger than the sum of its proper divisors (3110775830).

6221551654 is a wasteful number, since it uses less digits than its factorization.

6221551654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110775829.

The product of its digits is 72000, while the sum is 37.

The square root of 6221551654 is about 78876.8131582406. The cubic root of 6221551654 is about 1839.2167087775.

The spelling of 6221551654 in words is "six billion, two hundred twenty-one million, five hundred fifty-one thousand, six hundred fifty-four".