51542450540 has 96 divisors (see below), whose sum is σ = 128246920704. Its totient is φ = 17032803840.

The previous prime is 51542450537. The next prime is 51542450543. The reversal of 51542450540 is 4505424515.

It is an interprime number because it is at equal distance from previous prime (51542450537) and next prime (51542450543).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 51542450540.

It is not an unprimeable number, because it can be changed into a prime (51542450543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 422327 + ... + 530513.

It is an arithmetic number, because the mean of its divisors is an integer number (1335905424).

Almost surely, 2^51542450540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51542450540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64123460352).

51542450540 is an abundant number, since it is smaller than the sum of its proper divisors (76704470164).

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

51542450540 is a wasteful number, since it uses less digits than its factorization.

51542450540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108327 (or 108325 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 51542450540 in words is "fifty-one billion, five hundred forty-two million, four hundred fifty thousand, five hundred forty".