51542133545 has 16 divisors (see below), whose sum is σ = 70716457728. Its totient is φ = 35328125760.

The previous prime is 51542133541. The next prime is 51542133571. The reversal of 51542133545 is 54533124515.

It is not a de Polignac number, because 51542133545 - 2² = 51542133541 is a prime.

It is a super-2 number, since 2×51542133545² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51542133499 and 51542133508.

It is not an unprimeable number, because it can be changed into a prime (51542133541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229901 + ... + 394890.

It is an arithmetic number, because the mean of its divisors is an integer number (4419778608).

Almost surely, 2^51542133545 is an apocalyptic number.

It is an amenable number.

51542133545 is a deficient number, since it is larger than the sum of its proper divisors (19174324183).

51542133545 is a wasteful number, since it uses less digits than its factorization.

51542133545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627160.

The product of its digits is 180000, while the sum is 38.

The spelling of 51542133545 in words is "fifty-one billion, five hundred forty-two million, one hundred thirty-three thousand, five hundred forty-five".