102051661636399 has 4 divisors (see below), whose sum is σ = 102072847371264. Its totient is φ = 102030475901536.

The previous prime is 102051661636373. The next prime is 102051661636427. The reversal of 102051661636399 is 993636166150201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102051661636399 - 2¹⁵ = 102051661603631 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (102051661636999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10592860207 + ... + 10592869840.

It is an arithmetic number, because the mean of its divisors is an integer number (25518211842816).

Almost surely, 2^{102051661636399} is an apocalyptic number.

102051661636399 is a deficient number, since it is larger than the sum of its proper divisors (21185734865).

102051661636399 is an equidigital number, since it uses as much as digits as its factorization.

102051661636399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21185734864.

The product of its (nonzero) digits is 9447840, while the sum is 58.

The spelling of 102051661636399 in words is "one hundred two trillion, fifty-one billion, six hundred sixty-one million, six hundred thirty-six thousand, three hundred ninety-nine".