77903932950 has 120 divisors (see below), whose sum is σ = 217547497200. Its totient is φ = 20669774400.

The previous prime is 77903932933. The next prime is 77903932961. The reversal of 77903932950 is 5923930977.

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

It is a congruent number.

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 59 ways as a sum of consecutive naturals, for example, 757620 + ... + 854280.

It is an arithmetic number, because the mean of its divisors is an integer number (1812895810).

Almost surely, 2^77903932950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77903932950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108773748600).

77903932950 is an abundant number, since it is smaller than the sum of its proper divisors (139643564250).

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

77903932950 is a wasteful number, since it uses less digits than its factorization.

77903932950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96884 (or 96870 counting only the distinct ones).

The product of its (nonzero) digits is 3214890, while the sum is 54.

The spelling of 77903932950 in words is "seventy-seven billion, nine hundred three million, nine hundred thirty-two thousand, nine hundred fifty".