1651065511506 has 16 divisors (see below), whose sum is σ = 3445701937344. Its totient is φ = 526426684784.

The previous prime is 1651065511499. The next prime is 1651065511507. The reversal of 1651065511506 is 6051155601561.

It is not an unprimeable number, because it can be changed into a prime (1651065511507) 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, 5982121281 + ... + 5982121556.

It is an arithmetic number, because the mean of its divisors is an integer number (215356371084).

Almost surely, 2^{1651065511506} is an apocalyptic number.

1651065511506 is an abundant number, since it is smaller than the sum of its proper divisors (1794636425838).

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

1651065511506 is a wasteful number, since it uses less digits than its factorization.

1651065511506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964242865.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 1651065511506 in words is "one trillion, six hundred fifty-one billion, sixty-five million, five hundred eleven thousand, five hundred six".