51542550000 has 360 divisors, whose sum is σ = 184209584832. Its totient is φ = 13446720000.

The previous prime is 51542549999. The next prime is 51542550001. The reversal of 51542550000 is 5524515.

51542550000 is a `hidden beast` number, since 5 + 154 + 2 + 5 + 500 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (51542549999) and next prime (51542550001).

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51542550001) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 21148782 + ... + 21151218.

Almost surely, 2^51542550000 is an apocalyptic number.

51542550000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51542550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92104792416).

51542550000 is an abundant number, since it is smaller than the sum of its proper divisors (132667034832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51542550000 is a wasteful number, since it uses less digits than its factorization.

51542550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The spelling of 51542550000 in words is "fifty-one billion, five hundred forty-two million, five hundred fifty thousand".