10640466421 has 4 divisors (see below), whose sum is σ = 11458963852. Its totient is φ = 9821968992.

The previous prime is 10640466391. The next prime is 10640466427. The reversal of 10640466421 is 12466404601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12466404601 = 7 ⋅1780914943.

It can be written as a sum of positive squares in 2 ways, for example, as 6801300900 + 3839165521 = 82470^2 + 61961^2 .

It is a cyclic number.

It is not a de Polignac number, because 10640466421 - 2¹³ = 10640458229 is a prime.

It is a super-2 number, since 2×10640466421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10640466427) 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, 409248696 + ... + 409248721.

It is an arithmetic number, because the mean of its divisors is an integer number (2864740963).

Almost surely, 2^10640466421 is an apocalyptic number.

It is an amenable number.

10640466421 is a deficient number, since it is larger than the sum of its proper divisors (818497431).

10640466421 is an equidigital number, since it uses as much as digits as its factorization.

10640466421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818497430.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 10640466421 in words is "ten billion, six hundred forty million, four hundred sixty-six thousand, four hundred twenty-one".