54639705687 has 32 divisors (see below), whose sum is σ = 84867793920. Its totient is φ = 30624687360.

The previous prime is 54639705667. The next prime is 54639705691. The reversal of 54639705687 is 78650793645.

It is not a de Polignac number, because 54639705687 - 2¹² = 54639701591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54639705687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54639705667) 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, 179014 + ... + 375932.

It is an arithmetic number, because the mean of its divisors is an integer number (2652118560).

Almost surely, 2^54639705687 is an apocalyptic number.

54639705687 is a deficient number, since it is larger than the sum of its proper divisors (30228088233).

54639705687 is a wasteful number, since it uses less digits than its factorization.

54639705687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197183.

The product of its (nonzero) digits is 38102400, while the sum is 60.

The spelling of 54639705687 in words is "fifty-four billion, six hundred thirty-nine million, seven hundred five thousand, six hundred eighty-seven".