10402663621 has 4 divisors (see below), whose sum is σ = 11888758432. Its totient is φ = 8916568812.

The previous prime is 10402663597. The next prime is 10402663639. The reversal of 10402663621 is 12636620401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12636620401 = 1453 ⋅8696917.

It is a cyclic number.

It is not a de Polignac number, because 10402663621 - 2⁷ = 10402663493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402603621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743047395 + ... + 743047408.

It is an arithmetic number, because the mean of its divisors is an integer number (2972189608).

Almost surely, 2^10402663621 is an apocalyptic number.

It is an amenable number.

10402663621 is a deficient number, since it is larger than the sum of its proper divisors (1486094811).

10402663621 is an equidigital number, since it uses as much as digits as its factorization.

10402663621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486094810.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 10402663621 in words is "ten billion, four hundred two million, six hundred sixty-three thousand, six hundred twenty-one".