10621404755653 has 2 divisors, whose sum is σ = 10621404755654. Its totient is φ = 10621404755652.

The previous prime is 10621404755617. The next prime is 10621404755693. The reversal of 10621404755653 is 35655740412601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7116185793924 + 3505218961729 = 2667618^2 + 1872223^2 .

It is a cyclic number.

It is not a de Polignac number, because 10621404755653 - 2¹⁷ = 10621404624581 is a prime.

It is a super-3 number, since 3×10621404755653³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 10621404755597 and 10621404755606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10621404755693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310702377826 + 5310702377827.

It is an arithmetic number, because the mean of its divisors is an integer number (5310702377827).

Almost surely, 2^{10621404755653} is an apocalyptic number.

It is an amenable number.

10621404755653 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621404755653 is an equidigital number, since it uses as much as digits as its factorization.

10621404755653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 10621404755653 in words is "ten trillion, six hundred twenty-one billion, four hundred four million, seven hundred fifty-five thousand, six hundred fifty-three".