6421377654 has 32 divisors (see below), whose sum is σ = 14272345440. Its totient is φ = 2140066656.

The previous prime is 6421377653. The next prime is 6421377667. The reversal of 6421377654 is 4567731246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421377653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579712 + ... + 590684.

It is an arithmetic number, because the mean of its divisors is an integer number (446010795).

Almost surely, 2^6421377654 is an apocalyptic number.

6421377654 is an abundant number, since it is smaller than the sum of its proper divisors (7850967786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421377654 is a wasteful number, since it uses less digits than its factorization.

6421377654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821 (or 21815 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 6421377654 is about 80133.4989501894. The cubic root of 6421377654 is about 1858.7004501990.

The spelling of 6421377654 in words is "six billion, four hundred twenty-one million, three hundred seventy-seven thousand, six hundred fifty-four".