4999999978 has 8 divisors (see below), whose sum is σ = 7531381440. Its totient is φ = 2489539500.

The previous prime is 4999999937. The next prime is 5000000029. The reversal of 4999999978 is 8799999994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5229648 + ... + 5230603.

It is an arithmetic number, because the mean of its divisors is an integer number (941422680).

Almost surely, 2^4999999978 is an apocalyptic number.

4999999978 is a deficient number, since it is larger than the sum of its proper divisors (2531381462).

4999999978 is a wasteful number, since it uses less digits than its factorization.

4999999978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10460492.

The product of its digits is 1071385056, while the sum is 82.

The square root of 4999999978 is about 70710.6779630913. The cubic root of 4999999978 is about 1709.9759441687.

It can be divided in two parts, 499999997 and 8, that added together give a palindrome (500000005).

The spelling of 4999999978 in words is "four billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-eight".