1019978055 has 16 divisors (see below), whose sum is σ = 1813294560. Its totient is φ = 543988224.

The previous prime is 1019978041. The next prime is 1019978077. The reversal of 1019978055 is 5508799101.

It is not a de Polignac number, because 1019978055 - 2⁴ = 1019978039 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1019978055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3777562 + ... + 3777831.

It is an arithmetic number, because the mean of its divisors is an integer number (113330910).

Almost surely, 2^1019978055 is an apocalyptic number.

1019978055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1019978055 is a deficient number, since it is larger than the sum of its proper divisors (793316505).

1019978055 is an equidigital number, since it uses as much as digits as its factorization.

1019978055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7555407 (or 7555401 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 1019978055 is about 31937.0952811930. The cubic root of 1019978055 is about 1006.6154904445.

The spelling of 1019978055 in words is "one billion, nineteen million, nine hundred seventy-eight thousand, fifty-five".