65151561 has 8 divisors (see below), whose sum is σ = 89216704. Its totient is φ = 42260400.

The previous prime is 65151557. The next prime is 65151563. The reversal of 65151561 is 16515156.

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

It is not a de Polignac number, because 65151561 - 2² = 65151557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65151563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293365 + ... + 293586.

It is an arithmetic number, because the mean of its divisors is an integer number (11152088).

Almost surely, 2^65151561 is an apocalyptic number.

It is an amenable number.

65151561 is a deficient number, since it is larger than the sum of its proper divisors (24065143).

65151561 is a wasteful number, since it uses less digits than its factorization.

65151561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586991.

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

The square root of 65151561 is about 8071.6516897101. The cubic root of 65151561 is about 402.3848385221.

The spelling of 65151561 in words is "sixty-five million, one hundred fifty-one thousand, five hundred sixty-one".