7420421644 has 12 divisors (see below), whose sum is σ = 13550335344. Its totient is φ = 3548897264.

The previous prime is 7420421641. The next prime is 7420421699. The reversal of 7420421644 is 4461240247.

It is not an unprimeable number, because it can be changed into a prime (7420421641) 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, 40328287 + ... + 40328470.

It is an arithmetic number, because the mean of its divisors is an integer number (1129194612).

Almost surely, 2^7420421644 is an apocalyptic number.

It is an amenable number.

7420421644 is a deficient number, since it is larger than the sum of its proper divisors (6129913700).

7420421644 is a wasteful number, since it uses less digits than its factorization.

7420421644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80656784 (or 80656782 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 7420421644 is about 86141.8692854990. The cubic root of 7420421644 is about 1950.4861066432.

The spelling of 7420421644 in words is "seven billion, four hundred twenty million, four hundred twenty-one thousand, six hundred forty-four".