106432637907781 has 16 divisors (see below), whose sum is σ = 110391988627456. Its totient is φ = 102506211990000.

The previous prime is 106432637907751. The next prime is 106432637907863. The reversal of 106432637907781 is 187709736234601.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 106432637907781 - 2¹³ = 106432637899589 is a prime.

It is a super-2 number, since 2×106432637907781² (a number of 29 digits) contains 22 as substring.

It is the 10316620-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106432637907731) by changing a digit.

It is a nontrivial repunit in base 10316619.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138357586 + ... + 139124716.

It is an arithmetic number, because the mean of its divisors is an integer number (6899499289216).

Almost surely, 2^{106432637907781} is an apocalyptic number.

106432637907781 is the 4613733-rd centered decagonal number.

It is an amenable number.

106432637907781 is a deficient number, since it is larger than the sum of its proper divisors (3959350719675).

106432637907781 is a wasteful number, since it uses less digits than its factorization.

106432637907781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788584.

The product of its (nonzero) digits is 64012032, while the sum is 64.

The spelling of 106432637907781 in words is "one hundred six trillion, four hundred thirty-two billion, six hundred thirty-seven million, nine hundred seven thousand, seven hundred eighty-one".