77402138260 has 24 divisors (see below), whose sum is σ = 162930599496. Its totient is φ = 30887310720.

The previous prime is 77402138213. The next prime is 77402138299. The reversal of 77402138260 is 6283120477.

It can be written as a sum of positive squares in 4 ways, for example, as 967583236 + 76434555024 = 31106^2 + 276468^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4587907 + ... + 4604746.

It is an arithmetic number, because the mean of its divisors is an integer number (6788774979).

Almost surely, 2^77402138260 is an apocalyptic number.

It is an amenable number.

77402138260 is an abundant number, since it is smaller than the sum of its proper divisors (85528461236).

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

77402138260 is a wasteful number, since it uses less digits than its factorization.

77402138260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9193083 (or 9193081 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 77402138260 in words is "seventy-seven billion, four hundred two million, one hundred thirty-eight thousand, two hundred sixty".