78903529650 has 720 divisors, whose sum is σ = 262817866080. Its totient is φ = 17356032000.

The previous prime is 78903529613. The next prime is 78903529667. The reversal of 78903529650 is 5692530987.

78903529650 is a `hidden beast` number, since 78 + 90 + 352 + 96 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 813438402 + ... + 813438498.

It is an arithmetic number, because the mean of its divisors is an integer number (365024814).

Almost surely, 2^78903529650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78903529650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131408933040).

78903529650 is an abundant number, since it is smaller than the sum of its proper divisors (183914336430).

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

78903529650 is a wasteful number, since it uses less digits than its factorization.

78903529650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 78903529650 in words is "seventy-eight billion, nine hundred three million, five hundred twenty-nine thousand, six hundred fifty".