51040154561 has 8 divisors (see below), whose sum is σ = 58955472864. Its totient is φ = 43670720320.

The previous prime is 51040154531. The next prime is 51040154603. The reversal of 51040154561 is 16545104015.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51040154561 is a prime.

It is a super-2 number, since 2×51040154561² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51040154531) 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, 136470815 + ... + 136471188.

It is an arithmetic number, because the mean of its divisors is an integer number (7369434108).

Almost surely, 2^51040154561 is an apocalyptic number.

It is an amenable number.

51040154561 is a deficient number, since it is larger than the sum of its proper divisors (7915318303).

51040154561 is a wasteful number, since it uses less digits than its factorization.

51040154561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272942031.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 51040154561 its reverse (16545104015), we get a palindrome (67585258576).

The spelling of 51040154561 in words is "fifty-one billion, forty million, one hundred fifty-four thousand, five hundred sixty-one".