55694639 has 16 divisors (see below), whose sum is σ = 74780160. Its totient is φ = 40059360.

The previous prime is 55694633. The next prime is 55694663. The reversal of 55694639 is 93649655.

It is not a de Polignac number, because 55694639 - 2¹² = 55690543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55694593 and 55694602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55694633) 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, 26819 + ... + 28820.

It is an arithmetic number, because the mean of its divisors is an integer number (4673760).

Almost surely, 2^55694639 is an apocalyptic number.

55694639 is a deficient number, since it is larger than the sum of its proper divisors (19085521).

55694639 is a wasteful number, since it uses less digits than its factorization.

55694639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55670.

The product of its digits is 874800, while the sum is 47.

The square root of 55694639 is about 7462.8840939680. The cubic root of 55694639 is about 381.8895704299.

The spelling of 55694639 in words is "fifty-five million, six hundred ninety-four thousand, six hundred thirty-nine".