55613945 has 8 divisors (see below), whose sum is σ = 67677120. Its totient is φ = 43864240.

The previous prime is 55613941. The next prime is 55613951. The reversal of 55613945 is 54931655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55613945 - 2² = 55613941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55613899 and 55613908.

It is not an unprimeable number, because it can be changed into a prime (55613941) 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, 77975 + ... + 78684.

It is an arithmetic number, because the mean of its divisors is an integer number (8459640).

Almost surely, 2^55613945 is an apocalyptic number.

It is an amenable number.

55613945 is a deficient number, since it is larger than the sum of its proper divisors (12063175).

55613945 is a wasteful number, since it uses less digits than its factorization.

55613945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156735.

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

The square root of 55613945 is about 7457.4757793774. The cubic root of 55613945 is about 381.7050458366.

The spelling of 55613945 in words is "fifty-five million, six hundred thirteen thousand, nine hundred forty-five".