53987378945 has 16 divisors (see below), whose sum is σ = 65125825680. Its totient is φ = 42963105024.

The previous prime is 53987378917. The next prime is 53987378989. The reversal of 53987378945 is 54987378935.

It can be written as a sum of positive squares in 8 ways, for example, as 6426747889 + 47560631056 = 80167^2 + 218084^2 .

It is a cyclic number.

It is not a de Polignac number, because 53987378945 - 2¹² = 53987374849 is a prime.

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, 817211 + ... + 880799.

It is an arithmetic number, because the mean of its divisors is an integer number (4070364105).

Almost surely, 2^53987378945 is an apocalyptic number.

It is an amenable number.

53987378945 is a deficient number, since it is larger than the sum of its proper divisors (11138446735).

53987378945 is a wasteful number, since it uses less digits than its factorization.

53987378945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64484.

The product of its digits is 228614400, while the sum is 68.

The spelling of 53987378945 in words is "fifty-three billion, nine hundred eighty-seven million, three hundred seventy-eight thousand, nine hundred forty-five".