106621543555 has 16 divisors (see below), whose sum is σ = 134067363840. Its totient is φ = 81247263328.

The previous prime is 106621543541. The next prime is 106621543559. The reversal of 106621543555 is 555345126601.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106621543555 is a prime.

It is a super-2 number, since 2×106621543555² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106621543559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1912147 + ... + 1967116.

It is an arithmetic number, because the mean of its divisors is an integer number (8379210240).

Almost surely, 2^106621543555 is an apocalyptic number.

106621543555 is a deficient number, since it is larger than the sum of its proper divisors (27445820285).

106621543555 is a wasteful number, since it uses less digits than its factorization.

106621543555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3879530.

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 106621543555 in words is "one hundred six billion, six hundred twenty-one million, five hundred forty-three thousand, five hundred fifty-five".