65541321651 has 8 divisors (see below), whose sum is σ = 94110615760. Its totient is φ = 40333120992.

The previous prime is 65541321641. The next prime is 65541321653. The reversal of 65541321651 is 15612314556.

65541321651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65541321651 - 2³⁴ = 48361452467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1680546709 = 65541321651 / (6 + 5 + 5 + 4 + 1 + 3 + 2 + 1 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65541321653) 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, 840273316 + ... + 840273393.

It is an arithmetic number, because the mean of its divisors is an integer number (11763826970).

Almost surely, 2^65541321651 is an apocalyptic number.

65541321651 is a deficient number, since it is larger than the sum of its proper divisors (28569294109).

65541321651 is a wasteful number, since it uses less digits than its factorization.

65541321651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680546725.

The product of its digits is 108000, while the sum is 39.

The spelling of 65541321651 in words is "sixty-five billion, five hundred forty-one million, three hundred twenty-one thousand, six hundred fifty-one".