77399552802 has 128 divisors (see below), whose sum is σ = 184950355968. Its totient is φ = 21283891200.

The previous prime is 77399552801. The next prime is 77399552803. The reversal of 77399552802 is 20825599377.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77399552801) and next prime (77399552803).

It is not an unprimeable number, because it can be changed into a prime (77399552801) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 37192402 + ... + 37194482.

It is an arithmetic number, because the mean of its divisors is an integer number (1444924656).

Almost surely, 2^77399552802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77399552802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92475177984).

77399552802 is an abundant number, since it is smaller than the sum of its proper divisors (107550803166).

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

77399552802 is a wasteful number, since it uses less digits than its factorization.

77399552802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824.

The product of its (nonzero) digits is 9525600, while the sum is 57.

The spelling of 77399552802 in words is "seventy-seven billion, three hundred ninety-nine million, five hundred fifty-two thousand, eight hundred two".