77983990202123 has 4 divisors (see below), whose sum is σ = 77985240990048. Its totient is φ = 77982739414200.

The previous prime is 77983990202077. The next prime is 77983990202171. The reversal of 77983990202123 is 32120209938977.

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

It is a cyclic number.

It is not a de Polignac number, because 77983990202123 - 2¹² = 77983990198027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77983960202123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625300436 + ... + 625425137.

It is an arithmetic number, because the mean of its divisors is an integer number (19496310247512).

Almost surely, 2^{77983990202123} is an apocalyptic number.

77983990202123 is a deficient number, since it is larger than the sum of its proper divisors (1250787925).

77983990202123 is a wasteful number, since it uses less digits than its factorization.

77983990202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250787924.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 77983990202123 in words is "seventy-seven trillion, nine hundred eighty-three billion, nine hundred ninety million, two hundred two thousand, one hundred twenty-three".