106421690638 has 16 divisors (see below), whose sum is σ = 159788290896. Its totient is φ = 53158956480.

The previous prime is 106421690629. The next prime is 106421690651. The reversal of 106421690638 is 836096124601.

It is a super-2 number, since 2×106421690638² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10497420 + ... + 10507552.

It is an arithmetic number, because the mean of its divisors is an integer number (9986768181).

Almost surely, 2^106421690638 is an apocalyptic number.

106421690638 is a deficient number, since it is larger than the sum of its proper divisors (53366600258).

106421690638 is a wasteful number, since it uses less digits than its factorization.

106421690638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14739.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 106421690638 in words is "one hundred six billion, four hundred twenty-one million, six hundred ninety thousand, six hundred thirty-eight".