55913645 has 4 divisors (see below), whose sum is σ = 67096380. Its totient is φ = 44730912.

The previous prime is 55913633. The next prime is 55913657. The reversal of 55913645 is 54631955.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55913633) and next prime (55913657).

It can be written as a sum of positive squares in 2 ways, for example, as 11744329 + 44169316 = 3427^2 + 6646^2 .

It is a cyclic number.

It is not a de Polignac number, because 55913645 - 2²⁴ = 39136429 is a prime.

It is a super-3 number, since 3×55913645³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55913599 and 55913608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5591360 + ... + 5591369.

It is an arithmetic number, because the mean of its divisors is an integer number (16774095).

Almost surely, 2^55913645 is an apocalyptic number.

It is an amenable number.

55913645 is a deficient number, since it is larger than the sum of its proper divisors (11182735).

55913645 is a wasteful number, since it uses less digits than its factorization.

55913645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182734.

The product of its digits is 81000, while the sum is 38.

The square root of 55913645 is about 7477.5427113458. The cubic root of 55913645 is about 382.3894792255.

The spelling of 55913645 in words is "fifty-five million, nine hundred thirteen thousand, six hundred forty-five".