4978506915 has 16 divisors (see below), whose sum is σ = 8850679200. Its totient is φ = 2655203616.

The previous prime is 4978506893. The next prime is 4978506931. The reversal of 4978506915 is 5196058794.

4978506915 is a `hidden beast` number, since 49 + 7 + 8 + 506 + 91 + 5 = 666.

It is not a de Polignac number, because 4978506915 - 2¹⁵ = 4978474147 is a prime.

It is a super-2 number, since 2×4978506915² = 49571062205405634450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18438780 + ... + 18439049.

It is an arithmetic number, because the mean of its divisors is an integer number (553167450).

Almost surely, 2^4978506915 is an apocalyptic number.

4978506915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4978506915 is a deficient number, since it is larger than the sum of its proper divisors (3872172285).

4978506915 is a wasteful number, since it uses less digits than its factorization.

4978506915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36877843 (or 36877837 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 4978506915 is about 70558.5353802075. The cubic root of 4978506915 is about 1707.5222502526.

The spelling of 4978506915 in words is "four billion, nine hundred seventy-eight million, five hundred six thousand, nine hundred fifteen".