691861422370 has 32 divisors (see below), whose sum is σ = 1247065680960. Its totient is φ = 276363679680.

The previous prime is 691861422367. The next prime is 691861422377. The reversal of 691861422370 is 73224168196.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (691861422377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24927961 + ... + 24955699.

It is an arithmetic number, because the mean of its divisors is an integer number (38970802530).

Almost surely, 2^691861422370 is an apocalyptic number.

691861422370 is a deficient number, since it is larger than the sum of its proper divisors (555204258590).

691861422370 is a wasteful number, since it uses less digits than its factorization.

691861422370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31090.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 691861422370 in words is "six hundred ninety-one billion, eight hundred sixty-one million, four hundred twenty-two thousand, three hundred seventy".