77903049850 has 12 divisors (see below), whose sum is σ = 144899672814. Its totient is φ = 31161219920.

The previous prime is 77903049841. The next prime is 77903049857. The reversal of 77903049850 is 5894030977.

It can be written as a sum of positive squares in 3 ways, for example, as 70235070361 + 7667979489 = 265019^2 + 87567^2 .

It is not an unprimeable number, because it can be changed into a prime (77903049857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 779030449 + ... + 779030548.

Almost surely, 2^77903049850 is an apocalyptic number.

77903049850 is a deficient number, since it is larger than the sum of its proper divisors (66996622964).

77903049850 is a wasteful number, since it uses less digits than its factorization.

77903049850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558061009 (or 1558061004 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 52.

The spelling of 77903049850 in words is "seventy-seven billion, nine hundred three million, forty-nine thousand, eight hundred fifty".