55078491 has 16 divisors (see below), whose sum is σ = 82526976. Its totient is φ = 32420256.

The previous prime is 55078477. The next prime is 55078519. The reversal of 55078491 is 19487055.

It is not a de Polignac number, because 55078491 - 2⁷ = 55078363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (55078091) 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, 29805 + ... + 31598.

It is an arithmetic number, because the mean of its divisors is an integer number (5157936).

Almost surely, 2^55078491 is an apocalyptic number.

55078491 is a deficient number, since it is larger than the sum of its proper divisors (27448485).

55078491 is a wasteful number, since it uses less digits than its factorization.

55078491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61442.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 55078491 is about 7421.4884625660. The cubic root of 55078491 is about 380.4760676870.

The spelling of 55078491 in words is "fifty-five million, seventy-eight thousand, four hundred ninety-one".