52778558140 has 96 divisors (see below), whose sum is σ = 138735410688. Its totient is φ = 16384800000.

The previous prime is 52778558101. The next prime is 52778558179. The reversal of 52778558140 is 4185587725.

52778558140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52778558101) and next prime (52778558179).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318270 + ... + 454810.

It is an arithmetic number, because the mean of its divisors is an integer number (1445160528).

Almost surely, 2^52778558140 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 52778558140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69367705344).

52778558140 is an abundant number, since it is smaller than the sum of its proper divisors (85956852548).

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

52778558140 is a wasteful number, since it uses less digits than its factorization.

52778558140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136819 (or 136817 counting only the distinct ones).

The product of its (nonzero) digits is 3136000, while the sum is 52.

The spelling of 52778558140 in words is "fifty-two billion, seven hundred seventy-eight million, five hundred fifty-eight thousand, one hundred forty".