10621705551 has 16 divisors (see below), whose sum is σ = 14729164800. Its totient is φ = 6802537248.

The previous prime is 10621705537. The next prime is 10621705597. The reversal of 10621705551 is 15550712601.

It is a happy number.

It is not a de Polignac number, because 10621705551 - 2⁶ = 10621705487 is a prime.

It is a super-2 number, since 2×10621705551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621705511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596871 + ... + 614408.

It is an arithmetic number, because the mean of its divisors is an integer number (920572800).

Almost surely, 2^10621705551 is an apocalyptic number.

10621705551 is a deficient number, since it is larger than the sum of its proper divisors (4107459249).

10621705551 is a wasteful number, since it uses less digits than its factorization.

10621705551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211398.

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 10621705551 in words is "ten billion, six hundred twenty-one million, seven hundred five thousand, five hundred fifty-one".