77847746740 has 48 divisors (see below), whose sum is σ = 179065630800. Its totient is φ = 28296783872.

The previous prime is 77847746729. The next prime is 77847746741. The reversal of 77847746740 is 4764774877.

It can be written as a sum of positive squares in 8 ways, for example, as 1597760784 + 76249985956 = 39972^2 + 276134^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77847746741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3937795 + ... + 3957514.

It is an arithmetic number, because the mean of its divisors is an integer number (3730533975).

Almost surely, 2^77847746740 is an apocalyptic number.

It is an amenable number.

77847746740 is an abundant number, since it is smaller than the sum of its proper divisors (101217884060).

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

77847746740 is a wasteful number, since it uses less digits than its factorization.

77847746740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7895364 (or 7895362 counting only the distinct ones).

The product of its (nonzero) digits is 51631104, while the sum is 61.

The spelling of 77847746740 in words is "seventy-seven billion, eight hundred forty-seven million, seven hundred forty-six thousand, seven hundred forty".