995820121655 has 32 divisors (see below), whose sum is σ = 1273165812288. Its totient is φ = 745133875200.

The previous prime is 995820121651. The next prime is 995820121657. The reversal of 995820121655 is 556121028599.

It is not a de Polignac number, because 995820121655 - 2² = 995820121651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 995820121597 and 995820121606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (995820121651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8749715 + ... + 8862795.

It is an arithmetic number, because the mean of its divisors is an integer number (39786431634).

Almost surely, 2^995820121655 is an apocalyptic number.

995820121655 is a deficient number, since it is larger than the sum of its proper divisors (277345690633).

995820121655 is a wasteful number, since it uses less digits than its factorization.

995820121655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113747.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 995820121655 in words is "nine hundred ninety-five billion, eight hundred twenty million, one hundred twenty-one thousand, six hundred fifty-five".