55621286542 has 32 divisors (see below), whose sum is σ = 87622534080. Its totient is φ = 26443818240.

The previous prime is 55621286537. The next prime is 55621286549. The reversal of 55621286542 is 24568212655.

It is a junction number, because it is equal to n+sod(n) for n = 55621286492 and 55621286501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55621286549) 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, 3917368 + ... + 3931540.

It is an arithmetic number, because the mean of its divisors is an integer number (2738204190).

Almost surely, 2^55621286542 is an apocalyptic number.

55621286542 is a deficient number, since it is larger than the sum of its proper divisors (32001247538).

55621286542 is a wasteful number, since it uses less digits than its factorization.

55621286542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15228.

The product of its digits is 1152000, while the sum is 46.

The spelling of 55621286542 in words is "fifty-five billion, six hundred twenty-one million, two hundred eighty-six thousand, five hundred forty-two".