53971628491 has 4 divisors (see below), whose sum is σ = 58878140184. Its totient is φ = 49065116800.

The previous prime is 53971628471. The next prime is 53971628539. The reversal of 53971628491 is 19482617935.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53971628491 - 2⁷ = 53971628363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53971628471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453255830 + ... + 2453255851.

It is an arithmetic number, because the mean of its divisors is an integer number (14719535046).

Almost surely, 2^53971628491 is an apocalyptic number.

53971628491 is a deficient number, since it is larger than the sum of its proper divisors (4906511693).

53971628491 is a wasteful number, since it uses less digits than its factorization.

53971628491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906511692.

The product of its digits is 3265920, while the sum is 55.

The spelling of 53971628491 in words is "fifty-three billion, nine hundred seventy-one million, six hundred twenty-eight thousand, four hundred ninety-one".