5555617278 has 32 divisors (see below), whose sum is σ = 11197332000. Its totient is φ = 1837549056.

The previous prime is 5555617259. The next prime is 5555617279. The reversal of 5555617278 is 8727165555.

It is a super-2 number, since 2×5555617278² = 61729766679224258568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5555617278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555617279) 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, 1063938 + ... + 1069146.

It is an arithmetic number, because the mean of its divisors is an integer number (349916625).

Almost surely, 2^5555617278 is an apocalyptic number.

5555617278 is an abundant number, since it is smaller than the sum of its proper divisors (5641714722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5555617278 is a wasteful number, since it uses less digits than its factorization.

5555617278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6556.

The product of its digits is 2940000, while the sum is 51.

The square root of 5555617278 is about 74536.0132955875. The cubic root of 5555617278 is about 1771.1041742685.

The spelling of 5555617278 in words is "five billion, five hundred fifty-five million, six hundred seventeen thousand, two hundred seventy-eight".