775348751772 has 144 divisors (see below), whose sum is σ = 2330189621760. Its totient is φ = 220828773312.

The previous prime is 775348751731. The next prime is 775348751773. The reversal of 775348751772 is 277157843577.

775348751772 is a `hidden beast` number, since 7 + 7 + 5 + 3 + 48 + 7 + 517 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775348751773) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1977129 + ... + 2336607.

Almost surely, 2^775348751772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 775348751772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165094810880).

775348751772 is an abundant number, since it is smaller than the sum of its proper divisors (1554840869988).

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

775348751772 is a wasteful number, since it uses less digits than its factorization.

775348751772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359822 (or 359808 counting only the distinct ones).

The product of its digits is 80673600, while the sum is 63.

The spelling of 775348751772 in words is "seven hundred seventy-five billion, three hundred forty-eight million, seven hundred fifty-one thousand, seven hundred seventy-two".