55861964 has 6 divisors (see below), whose sum is σ = 97758444. Its totient is φ = 27930980.

The previous prime is 55861951. The next prime is 55861999. The reversal of 55861964 is 46916855.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6982742 + ... + 6982749.

It is an arithmetic number, because the mean of its divisors is an integer number (16293074).

Almost surely, 2^55861964 is an apocalyptic number.

It is an amenable number.

55861964 is a deficient number, since it is larger than the sum of its proper divisors (41896480).

55861964 is a wasteful number, since it uses less digits than its factorization.

55861964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13965495 (or 13965493 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 55861964 is about 7474.0861648766. The cubic root of 55861964 is about 382.2716286689.

The spelling of 55861964 in words is "fifty-five million, eight hundred sixty-one thousand, nine hundred sixty-four".