6490983978 has 16 divisors (see below), whose sum is σ = 14424408960. Its totient is φ = 2163661308.

The previous prime is 6490983977. The next prime is 6490983991. The reversal of 6490983978 is 8793890946.

It is not an unprimeable number, because it can be changed into a prime (6490983973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60101650 + ... + 60101757.

It is an arithmetic number, because the mean of its divisors is an integer number (901525560).

Almost surely, 2^6490983978 is an apocalyptic number.

6490983978 is an abundant number, since it is smaller than the sum of its proper divisors (7933424982).

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

6490983978 is a wasteful number, since it uses less digits than its factorization.

6490983978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120203418 (or 120203412 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The square root of 6490983978 is about 80566.6430850883. The cubic root of 6490983978 is about 1865.3922970180.

The spelling of 6490983978 in words is "six billion, four hundred ninety million, nine hundred eighty-three thousand, nine hundred seventy-eight".