7421528314387 has 12 divisors (see below), whose sum is σ = 8157987837328. Its totient is φ = 6746479858800.

The previous prime is 7421528314351. The next prime is 7421528314393. The reversal of 7421528314387 is 7834138251247.

It is not a de Polignac number, because 7421528314387 - 2²⁷ = 7421394096659 is a prime.

It is a super-2 number, since 2×7421528314387² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7421528314337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609562 + ... + 3900592.

Almost surely, 2^{7421528314387} is an apocalyptic number.

7421528314387 is a deficient number, since it is larger than the sum of its proper divisors (736459522941).

7421528314387 is a wasteful number, since it uses less digits than its factorization.

7421528314387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309690 (or 3309679 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 55.

The spelling of 7421528314387 in words is "seven trillion, four hundred twenty-one billion, five hundred twenty-eight million, three hundred fourteen thousand, three hundred eighty-seven".