77000000000 has 400 divisors, whose sum is σ = 239765600448. Its totient is φ = 24000000000.

The previous prime is 76999999981. The next prime is 77000000023. The reversal of 77000000000 is 77.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6999999995 + ... + 7000000005.

Almost surely, 2^77000000000 is an apocalyptic number.

77000000000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119882800224).

77000000000 is an abundant number, since it is smaller than the sum of its proper divisors (162765600448).

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

77000000000 is an frugal number, since it uses more digits than its factorization.

77000000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 49, while the sum is 14.

Adding to 77000000000 its reverse (77), we get a palindrome (77000000077).

77000000000 divided by its reverse (77) gives a 9-th power (1000000000 = 10⁹).

It can be divided in two parts, 7 and 7000000000, that added together give a palindrome (7000000007).

The spelling of 77000000000 in words is "seventy-seven billion", and thus it is an aban number and an uban number.