77450488780 has 72 divisors (see below), whose sum is σ = 193226136768. Its totient is φ = 25989449472.

The previous prime is 77450488771. The next prime is 77450488783. The reversal of 77450488780 is 8788405477.

It is a super-4 number, since 4×77450488780⁴ (a number of 45 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (77450488783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 794697 + ... + 886816.

It is an arithmetic number, because the mean of its divisors is an integer number (2683696344).

Almost surely, 2^77450488780 is an apocalyptic number.

77450488780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77450488780 is an abundant number, since it is smaller than the sum of its proper divisors (115775647988).

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

77450488780 is a wasteful number, since it uses less digits than its factorization.

77450488780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681583 (or 1681574 counting only the distinct ones).

The product of its (nonzero) digits is 14049280, while the sum is 58.

The spelling of 77450488780 in words is "seventy-seven billion, four hundred fifty million, four hundred eighty-eight thousand, seven hundred eighty".