10421007644 has 6 divisors (see below), whose sum is σ = 18236763384. Its totient is φ = 5210503820.

The previous prime is 10421007643. The next prime is 10421007659. The reversal of 10421007644 is 44670012401.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421007643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1302625952 + ... + 1302625959.

It is an arithmetic number, because the mean of its divisors is an integer number (3039460564).

Almost surely, 2^10421007644 is an apocalyptic number.

It is an amenable number.

10421007644 is a deficient number, since it is larger than the sum of its proper divisors (7815755740).

10421007644 is a wasteful number, since it uses less digits than its factorization.

10421007644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605251915 (or 2605251913 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The spelling of 10421007644 in words is "ten billion, four hundred twenty-one million, seven thousand, six hundred forty-four".