53438244615 has 80 divisors (see below), whose sum is σ = 109724155200. Its totient is φ = 24373923840.

The previous prime is 53438244611. The next prime is 53438244619. The reversal of 53438244615 is 51644283435.

53438244615 is a `hidden beast` number, since 5 + 3 + 4 + 3 + 8 + 24 + 4 + 615 = 666.

53438244615 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 (53438244611) and next prime (53438244619).

It is not a de Polignac number, because 53438244615 - 2² = 53438244611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53438244611) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1251925 + ... + 1293905.

It is an arithmetic number, because the mean of its divisors is an integer number (1371551940).

Almost surely, 2^53438244615 is an apocalyptic number.

53438244615 is an abundant number, since it is smaller than the sum of its proper divisors (56285910585).

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

53438244615 is a wasteful number, since it uses less digits than its factorization.

53438244615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42454 (or 42445 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 53438244615 in words is "fifty-three billion, four hundred thirty-eight million, two hundred forty-four thousand, six hundred fifteen".