53561553540 has 96 divisors (see below), whose sum is σ = 173230130304. Its totient is φ = 12220815360.

The previous prime is 53561553517. The next prime is 53561553547. The reversal of 53561553540 is 4535516535.

It is a junction number, because it is equal to n+sod(n) for n = 53561553492 and 53561553501.

It is not an unprimeable number, because it can be changed into a prime (53561553547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2375659 + ... + 2398098.

It is an arithmetic number, because the mean of its divisors is an integer number (1804480524).

Almost surely, 2^53561553540 is an apocalyptic number.

It is an amenable number.

53561553540 is an abundant number, since it is smaller than the sum of its proper divisors (119668576764).

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

53561553540 is a wasteful number, since it uses less digits than its factorization.

53561553540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773797 (or 4773795 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 42.

It can be divided in two parts, 535615 and 53540, that added together give a triangular number (589155 = T₁₀₈₅).

The spelling of 53561553540 in words is "fifty-three billion, five hundred sixty-one million, five hundred fifty-three thousand, five hundred forty".