634363972487 has 4 divisors (see below), whose sum is σ = 724987397136. Its totient is φ = 543740547840.

The previous prime is 634363972439. The next prime is 634363972559. The reversal of 634363972487 is 784279363436.

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

It is not a de Polignac number, because 634363972487 - 2⁶ = 634363972423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634363972987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45311712314 + ... + 45311712327.

It is an arithmetic number, because the mean of its divisors is an integer number (181246849284).

Almost surely, 2^634363972487 is an apocalyptic number.

634363972487 is a deficient number, since it is larger than the sum of its proper divisors (90623424649).

634363972487 is an equidigital number, since it uses as much as digits as its factorization.

634363972487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90623424648.

The product of its digits is 109734912, while the sum is 62.

The spelling of 634363972487 in words is "six hundred thirty-four billion, three hundred sixty-three million, nine hundred seventy-two thousand, four hundred eighty-seven".