1202405989655 has 8 divisors (see below), whose sum is σ = 1553878509792. Its totient is φ = 887930576928.

The previous prime is 1202405989643. The next prime is 1202405989663. The reversal of 1202405989655 is 5569895042021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1202405989655 - 2¹² = 1202405985559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202405989655.

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, 9249276779 + ... + 9249276908.

It is an arithmetic number, because the mean of its divisors is an integer number (194234813724).

Almost surely, 2^{1202405989655} is an apocalyptic number.

1202405989655 is a deficient number, since it is larger than the sum of its proper divisors (351472520137).

1202405989655 is a wasteful number, since it uses less digits than its factorization.

1202405989655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498553705.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 1202405989655 in words is "one trillion, two hundred two billion, four hundred five million, nine hundred eighty-nine thousand, six hundred fifty-five".