102444201990 has 72 divisors (see below), whose sum is σ = 288419873040. Its totient is φ = 25217030592.

The previous prime is 102444201989. The next prime is 102444201991. The reversal of 102444201990 is 99102444201.

102444201990 is a `hidden beast` number, since 1 + 0 + 2 + 44 + 420 + 199 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (102444201989) and next prime (102444201991).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102444201991) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3352450 + ... + 3382869.

It is an arithmetic number, because the mean of its divisors is an integer number (4005831570).

Almost surely, 2^102444201990 is an apocalyptic number.

102444201990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102444201990 is an abundant number, since it is smaller than the sum of its proper divisors (185975671050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102444201990 is a wasteful number, since it uses less digits than its factorization.

102444201990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735358 (or 6735342 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 102444201990 in words is "one hundred two billion, four hundred forty-four million, two hundred one thousand, nine hundred ninety".