51541540145 has 8 divisors (see below), whose sum is σ = 61851081600. Its totient is φ = 41232409840.

The previous prime is 51541540109. The next prime is 51541540147. The reversal of 51541540145 is 54104514515.

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

It is not a de Polignac number, because 51541540145 - 2¹⁰ = 51541539121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51541540147) 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, 374456 + ... + 493254.

It is an arithmetic number, because the mean of its divisors is an integer number (7731385200).

Almost surely, 2^51541540145 is an apocalyptic number.

It is an amenable number.

51541540145 is a deficient number, since it is larger than the sum of its proper divisors (10309541455).

51541540145 is a wasteful number, since it uses less digits than its factorization.

51541540145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205575.

The product of its (nonzero) digits is 40000, while the sum is 35.

The spelling of 51541540145 in words is "fifty-one billion, five hundred forty-one million, five hundred forty thousand, one hundred forty-five".