202123861544 has 32 divisors (see below), whose sum is σ = 435194920800. Its totient is φ = 87038982720.

The previous prime is 202123861531. The next prime is 202123861573. The reversal of 202123861544 is 445168321202.

202123861544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 202123861498 and 202123861507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60442067 + ... + 60445410.

It is an arithmetic number, because the mean of its divisors is an integer number (13599841275).

Almost surely, 2^202123861544 is an apocalyptic number.

It is an amenable number.

202123861544 is an abundant number, since it is smaller than the sum of its proper divisors (233071059256).

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

202123861544 is a wasteful number, since it uses less digits than its factorization.

202123861544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120887513 (or 120887509 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 38.

The spelling of 202123861544 in words is "two hundred two billion, one hundred twenty-three million, eight hundred sixty-one thousand, five hundred forty-four".