77988852450 has 72 divisors (see below), whose sum is σ = 210212930928. Its totient is φ = 20729247840.

The previous prime is 77988852413. The next prime is 77988852457. The reversal of 77988852450 is 5425888977.

It is a super-2 number, since 2×77988852450² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77988852457) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 144112 + ... + 420411.

Almost surely, 2^77988852450 is an apocalyptic number.

77988852450 is an abundant number, since it is smaller than the sum of its proper divisors (132224078478).

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

77988852450 is a wasteful number, since it uses less digits than its factorization.

77988852450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564848 (or 564840 counting only the distinct ones).

The product of its (nonzero) digits is 45158400, while the sum is 63.

The spelling of 77988852450 in words is "seventy-seven billion, nine hundred eighty-eight million, eight hundred fifty-two thousand, four hundred fifty".