53865091840 has 144 divisors (see below), whose sum is σ = 152541103680. Its totient is φ = 17831116800.

The previous prime is 53865091783. The next prime is 53865091897. The reversal of 53865091840 is 4819056835.

It is an interprime number because it is at equal distance from previous prime (53865091783) and next prime (53865091897).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156190 + ... + 363490.

It is an arithmetic number, because the mean of its divisors is an integer number (1059313220).

Almost surely, 2^53865091840 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 53865091840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76270551840).

53865091840 is an abundant number, since it is smaller than the sum of its proper divisors (98676011840).

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

53865091840 is a wasteful number, since it uses less digits than its factorization.

53865091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207358 (or 207344 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 53865091840 in words is "fifty-three billion, eight hundred sixty-five million, ninety-one thousand, eight hundred forty".