1979180505 has 48 divisors (see below), whose sum is σ = 3708793920. Its totient is φ = 972964224.

The previous prime is 1979180503. The next prime is 1979180509. The reversal of 1979180505 is 5050819791.

It is not a de Polignac number, because 1979180505 - 2¹ = 1979180503 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1979180503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 354 + ... + 62916.

It is an arithmetic number, because the mean of its divisors is an integer number (77266540).

Almost surely, 2^1979180505 is an apocalyptic number.

1979180505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1979180505 is a deficient number, since it is larger than the sum of its proper divisors (1729613415).

1979180505 is a wasteful number, since it uses less digits than its factorization.

1979180505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62630 (or 62627 counting only the distinct ones).

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

The square root of 1979180505 is about 44487.9815792985. The cubic root of 1979180505 is about 1255.5339717040.

The spelling of 1979180505 in words is "one billion, nine hundred seventy-nine million, one hundred eighty thousand, five hundred five".