691344741252 has 24 divisors (see below), whose sum is σ = 1759786614432. Its totient is φ = 209498406400.

The previous prime is 691344741239. The next prime is 691344741313. The reversal of 691344741252 is 252147443196.

691344741252 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 is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2618729949 + ... + 2618730212.

It is an arithmetic number, because the mean of its divisors is an integer number (73324442268).

Almost surely, 2^691344741252 is an apocalyptic number.

It is an amenable number.

691344741252 is an abundant number, since it is smaller than the sum of its proper divisors (1068441873180).

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

691344741252 is a wasteful number, since it uses less digits than its factorization.

691344741252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237460179 (or 5237460177 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 48.

The spelling of 691344741252 in words is "six hundred ninety-one billion, three hundred forty-four million, seven hundred forty-one thousand, two hundred fifty-two".