6349978611 has 16 divisors (see below), whose sum is σ = 9423263520. Its totient is φ = 4226169600.

The previous prime is 6349978571. The next prime is 6349978637. The reversal of 6349978611 is 1168799436.

6349978611 is a `hidden beast` number, since 63 + 499 + 7 + 86 + 11 = 666.

It is not a de Polignac number, because 6349978611 - 2²¹ = 6347881459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6349979611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182290 + ... + 214311.

It is an arithmetic number, because the mean of its divisors is an integer number (588953970).

Almost surely, 2^6349978611 is an apocalyptic number.

6349978611 is a deficient number, since it is larger than the sum of its proper divisors (3073284909).

6349978611 is a wasteful number, since it uses less digits than its factorization.

6349978611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397203 (or 397197 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 6349978611 is about 79686.7530459110. The cubic root of 6349978611 is about 1851.7858198693.

The spelling of 6349978611 in words is "six billion, three hundred forty-nine million, nine hundred seventy-eight thousand, six hundred eleven".