634040065540103 has 4 divisors (see below), whose sum is σ = 634195734600288. Its totient is φ = 633884396479920.

The previous prime is 634040065540099. The next prime is 634040065540117. The reversal of 634040065540103 is 301045560040436.

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 634040065540103 - 2² = 634040065540099 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 (634040065540183) 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, 77834523983 + ... + 77834532128.

It is an arithmetic number, because the mean of its divisors is an integer number (158548933650072).

Almost surely, 2^{634040065540103} is an apocalyptic number.

634040065540103 is a deficient number, since it is larger than the sum of its proper divisors (155669060185).

634040065540103 is a wasteful number, since it uses less digits than its factorization.

634040065540103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155669060184.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 634040065540103 in words is "six hundred thirty-four trillion, forty billion, sixty-five million, five hundred forty thousand, one hundred three".