55640621332 has 24 divisors (see below), whose sum is σ = 99220627296. Its totient is φ = 27292001568.

The previous prime is 55640621317. The next prime is 55640621339. The reversal of 55640621332 is 23312604655.

It is a super-2 number, since 2×55640621332² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55640621291 and 55640621300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640621339) 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, 3010303 + ... + 3028729.

It is an arithmetic number, because the mean of its divisors is an integer number (4134192804).

Almost surely, 2^55640621332 is an apocalyptic number.

It is an amenable number.

55640621332 is a deficient number, since it is larger than the sum of its proper divisors (43580005964).

55640621332 is a wasteful number, since it uses less digits than its factorization.

55640621332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32727 (or 32725 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 55640621332 in words is "fifty-five billion, six hundred forty million, six hundred twenty-one thousand, three hundred thirty-two".