634778475061 has 8 divisors (see below), whose sum is σ = 636822490304. Its totient is φ = 632735409600.

The previous prime is 634778475011. The next prime is 634778475101. The reversal of 634778475061 is 160574877436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 634778475061 - 2¹⁵ = 634778442293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634778474987 and 634778475005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634778475011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113736 + ... + 1584286.

It is an arithmetic number, because the mean of its divisors is an integer number (79602811288).

Almost surely, 2^634778475061 is an apocalyptic number.

It is an amenable number.

634778475061 is a deficient number, since it is larger than the sum of its proper divisors (2044015243).

634778475061 is a wasteful number, since it uses less digits than its factorization.

634778475061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474891.

The product of its (nonzero) digits is 23708160, while the sum is 58.

The spelling of 634778475061 in words is "six hundred thirty-four billion, seven hundred seventy-eight million, four hundred seventy-five thousand, sixty-one".