102405545453444 has 24 divisors (see below), whose sum is σ = 180414061695000. Its totient is φ = 50858676807680.

The previous prime is 102405545453417. The next prime is 102405545453473. The reversal of 102405545453444 is 444354545504201.

It can be written as a sum of positive squares in 4 ways, for example, as 851353145344 + 101554192308100 = 922688^2 + 10077410^2 .

It is a super-2 number, since 2×102405545453444² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102405545453392 and 102405545453401.

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, 71977124 + ... + 73386084.

It is an arithmetic number, because the mean of its divisors is an integer number (7517252570625).

Almost surely, 2^{102405545453444} is an apocalyptic number.

It is an amenable number.

102405545453444 is a deficient number, since it is larger than the sum of its proper divisors (78008516241556).

102405545453444 is a wasteful number, since it uses less digits than its factorization.

102405545453444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531063 (or 1531061 counting only the distinct ones).

The product of its (nonzero) digits is 15360000, while the sum is 50.

The spelling of 102405545453444 in words is "one hundred two trillion, four hundred five billion, five hundred forty-five million, four hundred fifty-three thousand, four hundred forty-four".