106401961618 has 4 divisors (see below), whose sum is σ = 159602942430. Its totient is φ = 53200980808.

The previous prime is 106401961613. The next prime is 106401961619. The reversal of 106401961618 is 816169104601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 71833112289 + 34568849329 = 268017^2 + 185927^2 .

It is a super-2 number, since 2×106401961618² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106401961613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26600490403 + ... + 26600490406.

Almost surely, 2^106401961618 is an apocalyptic number.

106401961618 is a deficient number, since it is larger than the sum of its proper divisors (53200980812).

106401961618 is an equidigital number, since it uses as much as digits as its factorization.

106401961618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53200980811.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 106401961618 in words is "one hundred six billion, four hundred one million, nine hundred sixty-one thousand, six hundred eighteen".