5642644451 has 4 divisors (see below), whose sum is σ = 5658019872. Its totient is φ = 5627269032.

The previous prime is 5642644439. The next prime is 5642644531. The reversal of 5642644451 is 1544462465.

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

It is a cyclic number.

It is not a de Polignac number, because 5642644451 - 2¹⁴ = 5642628067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5642644399 and 5642644408.

It is not an unprimeable number, because it can be changed into a prime (5642644951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7687160 + ... + 7687893.

It is an arithmetic number, because the mean of its divisors is an integer number (1414504968).

Almost surely, 2^5642644451 is an apocalyptic number.

5642644451 is a deficient number, since it is larger than the sum of its proper divisors (15375421).

5642644451 is a wasteful number, since it uses less digits than its factorization.

5642644451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15375420.

The product of its digits is 460800, while the sum is 41.

The square root of 5642644451 is about 75117.5375727932. The cubic root of 5642644451 is about 1780.3042499536.

The spelling of 5642644451 in words is "five billion, six hundred forty-two million, six hundred forty-four thousand, four hundred fifty-one".