77671480040 has 64 divisors (see below), whose sum is σ = 217883640960. Its totient is φ = 24209291520.

The previous prime is 77671480031. The next prime is 77671480069. The reversal of 77671480040 is 4008417677.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 77671479973 and 77671480000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12605927 + ... + 12612086.

It is an arithmetic number, because the mean of its divisors is an integer number (3404431890).

Almost surely, 2^77671480040 is an apocalyptic number.

77671480040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

77671480040 is an abundant number, since it is smaller than the sum of its proper divisors (140212160920).

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

77671480040 is a wasteful number, since it uses less digits than its factorization.

77671480040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25218042 (or 25218038 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 44.

The spelling of 77671480040 in words is "seventy-seven billion, six hundred seventy-one million, four hundred eighty thousand, forty".