781229508552 has 24 divisors (see below), whose sum is σ = 2115829919190. Its totient is φ = 260409836160.

The previous prime is 781229508551. The next prime is 781229508557. The reversal of 781229508552 is 255805922187.

781229508552 is a `hidden beast` number, since 7 + 8 + 12 + 29 + 50 + 8 + 552 = 666.

781229508552 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 573342753636 + 207886754916 = 757194^2 + 455946^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×781229508552² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781229508551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5425204849 + ... + 5425204992.

Almost surely, 2^781229508552 is an apocalyptic number.

781229508552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

781229508552 is an abundant number, since it is smaller than the sum of its proper divisors (1334600410638).

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

781229508552 is a wasteful number, since it uses less digits than its factorization.

781229508552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850409853 (or 10850409846 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 54.

The spelling of 781229508552 in words is "seven hundred eighty-one billion, two hundred twenty-nine million, five hundred eight thousand, five hundred fifty-two".