7421247136651 has 4 divisors (see below), whose sum is σ = 7448631812704. Its totient is φ = 7393862460600.

The previous prime is 7421247136637. The next prime is 7421247136661. The reversal of 7421247136651 is 1566317421247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7421247136651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7421247136595 and 7421247136604.

It is not an unprimeable number, because it can be changed into a prime (7421247136661) 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, 13692337620 + ... + 13692338161.

It is an arithmetic number, because the mean of its divisors is an integer number (1862157953176).

Almost surely, 2^{7421247136651} is an apocalyptic number.

7421247136651 is a deficient number, since it is larger than the sum of its proper divisors (27384676053).

7421247136651 is a wasteful number, since it uses less digits than its factorization.

7421247136651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27384676052.

The product of its digits is 1693440, while the sum is 49.

The spelling of 7421247136651 in words is "seven trillion, four hundred twenty-one billion, two hundred forty-seven million, one hundred thirty-six thousand, six hundred fifty-one".