623649998996 has 6 divisors (see below), whose sum is σ = 1091387498250. Its totient is φ = 311824999496.

The previous prime is 623649998953. The next prime is 623649999017. The reversal of 623649998996 is 699899946326.

It can be written as a sum of positive squares in only one way, i.e., 380417568400 + 243232430596 = 616780^2 + 493186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 623649998996.

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, 77956249871 + ... + 77956249878.

It is an arithmetic number, because the mean of its divisors is an integer number (181897916375).

Almost surely, 2^623649998996 is an apocalyptic number.

It is an amenable number.

623649998996 is a deficient number, since it is larger than the sum of its proper divisors (467737499254).

623649998996 is a wasteful number, since it uses less digits than its factorization.

623649998996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155912499753 (or 155912499751 counting only the distinct ones).

The product of its digits is 2448880128, while the sum is 80.

The spelling of 623649998996 in words is "six hundred twenty-three billion, six hundred forty-nine million, nine hundred ninety-eight thousand, nine hundred ninety-six".