6501501651 has 16 divisors (see below), whose sum is σ = 8912913408. Its totient is φ = 4212993600.

The previous prime is 6501501649. The next prime is 6501501683. The reversal of 6501501651 is 1561051056.

It is not a de Polignac number, because 6501501651 - 2¹ = 6501501649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6501500651) 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, 64191 + ... + 130856.

It is an arithmetic number, because the mean of its divisors is an integer number (557057088).

Almost surely, 2^6501501651 is an apocalyptic number.

6501501651 is a deficient number, since it is larger than the sum of its proper divisors (2411411757).

6501501651 is a wasteful number, since it uses less digits than its factorization.

6501501651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195362.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 6501501651 is about 80631.8897893383. The cubic root of 6501501651 is about 1866.3992834738.

The spelling of 6501501651 in words is "six billion, five hundred one million, five hundred one thousand, six hundred fifty-one".