55681693212 has 24 divisors (see below), whose sum is σ = 134115046912. Its totient is φ = 17961836400.

The previous prime is 55681693201. The next prime is 55681693217. The reversal of 55681693212 is 21239618655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55681693217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74840614 + ... + 74841357.

Almost surely, 2^55681693212 is an apocalyptic number.

It is an amenable number.

55681693212 is an abundant number, since it is smaller than the sum of its proper divisors (78433353700).

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

55681693212 is a wasteful number, since it uses less digits than its factorization.

55681693212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149682009 (or 149682007 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The spelling of 55681693212 in words is "fifty-five billion, six hundred eighty-one million, six hundred ninety-three thousand, two hundred twelve".