777950872020 has 768 divisors, whose sum is σ = 2927193292800. Its totient is φ = 167789905920.

The previous prime is 777950871953. The next prime is 777950872021. The reversal of 777950872020 is 20278059777.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777950872021) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1422213387 + ... + 1422213933.

It is an arithmetic number, because the mean of its divisors is an integer number (3811449600).

Almost surely, 2^777950872020 is an apocalyptic number.

777950872020 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 777950872020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463596646400).

777950872020 is an abundant number, since it is smaller than the sum of its proper divisors (2149242420780).

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

777950872020 is a wasteful number, since it uses less digits than its factorization.

777950872020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 54.

The spelling of 777950872020 in words is "seven hundred seventy-seven billion, nine hundred fifty million, eight hundred seventy-two thousand, twenty".