691616494934 has 8 divisors (see below), whose sum is σ = 1070890056768. Its totient is φ = 334653142680.

The previous prime is 691616494889. The next prime is 691616494939. The reversal of 691616494934 is 439494616196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (62), and also a Moran number because the ratio is a prime number: 11155104757 = 691616494934 / (6 + 9 + 1 + 6 + 1 + 6 + 4 + 9 + 4 + 9 + 3 + 4).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691616494939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5577552317 + ... + 5577552440.

It is an arithmetic number, because the mean of its divisors is an integer number (133861257096).

Almost surely, 2^691616494934 is an apocalyptic number.

691616494934 is a deficient number, since it is larger than the sum of its proper divisors (379273561834).

691616494934 is a wasteful number, since it uses less digits than its factorization.

691616494934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155104790.

The product of its digits is 30233088, while the sum is 62.

The spelling of 691616494934 in words is "six hundred ninety-one billion, six hundred sixteen million, four hundred ninety-four thousand, nine hundred thirty-four".