51435531545 has 8 divisors (see below), whose sum is σ = 63713690880. Its totient is φ = 39821056560.

The previous prime is 51435531533. The next prime is 51435531547. The reversal of 51435531545 is 54513553415.

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

It is not a de Polignac number, because 51435531545 - 2⁸ = 51435531289 is a prime.

It is a super-2 number, since 2×51435531545² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51435531547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165920915 + ... + 165921224.

It is an arithmetic number, because the mean of its divisors is an integer number (7964211360).

Almost surely, 2^51435531545 is an apocalyptic number.

It is an amenable number.

51435531545 is a deficient number, since it is larger than the sum of its proper divisors (12278159335).

51435531545 is a wasteful number, since it uses less digits than its factorization.

51435531545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331842175.

The product of its digits is 450000, while the sum is 41.

The spelling of 51435531545 in words is "fifty-one billion, four hundred thirty-five million, five hundred thirty-one thousand, five hundred forty-five".