202112641243654 has 4 divisors (see below), whose sum is σ = 303168961865484. Its totient is φ = 101056320621826.

The previous prime is 202112641243649. The next prime is 202112641243697. The reversal of 202112641243654 is 456342146211202.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202112641243654.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50528160310912 + ... + 50528160310915.

It is an arithmetic number, because the mean of its divisors is an integer number (75792240466371).

Almost surely, 2^{202112641243654} is an apocalyptic number.

202112641243654 is a deficient number, since it is larger than the sum of its proper divisors (101056320621830).

202112641243654 is a wasteful number, since it uses less digits than its factorization.

202112641243654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101056320621829.

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 202112641243654 its reverse (456342146211202), we get a palindrome (658454787454856).

The spelling of 202112641243654 in words is "two hundred two trillion, one hundred twelve billion, six hundred forty-one million, two hundred forty-three thousand, six hundred fifty-four".