55378611 has 12 divisors (see below), whose sum is σ = 80142192. Its totient is φ = 36849456.

The previous prime is 55378607. The next prime is 55378621. The reversal of 55378611 is 11687355.

55378611 is a `hidden beast` number, since 5 + 5 + 37 + 8 + 611 = 666.

It is not a de Polignac number, because 55378611 - 2² = 55378607 is a prime.

It is a super-3 number, since 3×55378611³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55378621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 511 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (6678516).

Almost surely, 2^55378611 is an apocalyptic number.

55378611 is a deficient number, since it is larger than the sum of its proper divisors (24763581).

55378611 is a wasteful number, since it uses less digits than its factorization.

55378611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11610 (or 11607 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 55378611 is about 7441.6806569484. The cubic root of 55378611 is about 381.1658814326.

The spelling of 55378611 in words is "fifty-five million, three hundred seventy-eight thousand, six hundred eleven".