631856741 has 8 divisors (see below), whose sum is σ = 637192920. Its totient is φ = 626531328.

The previous prime is 631856677. The next prime is 631856777. The reversal of 631856741 is 147658136.

It can be written as a sum of positive squares in 4 ways, for example, as 19492225 + 612364516 = 4415^2 + 24746^2 .

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 631856741 - 2⁶ = 631856677 is a prime.

It is a super-2 number, since 2×631856741² = 798485882294282162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631856441) 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, 150965 + ... + 155093.

It is an arithmetic number, because the mean of its divisors is an integer number (79649115).

Almost surely, 2^631856741 is an apocalyptic number.

It is an amenable number.

631856741 is a deficient number, since it is larger than the sum of its proper divisors (5336179).

631856741 is a wasteful number, since it uses less digits than its factorization.

631856741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5383.

The product of its digits is 120960, while the sum is 41.

The square root of 631856741 is about 25136.7607499455. The cubic root of 631856741 is about 858.1032385740.

The spelling of 631856741 in words is "six hundred thirty-one million, eight hundred fifty-six thousand, seven hundred forty-one".