1630856431 has 16 divisors (see below), whose sum is σ = 1756085760. Its totient is φ = 1509675840.

The previous prime is 1630856429. The next prime is 1630856473. The reversal of 1630856431 is 1346580361.

It is a cyclic number.

It is not a de Polignac number, because 1630856431 - 2¹ = 1630856429 is a prime.

It is a super-2 number, since 2×1630856431² = 5319385397068115522, 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 (1630856131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764236 + ... + 766366.

It is an arithmetic number, because the mean of its divisors is an integer number (109755360).

Almost surely, 2^1630856431 is an apocalyptic number.

1630856431 is a deficient number, since it is larger than the sum of its proper divisors (125229329).

1630856431 is a wasteful number, since it uses less digits than its factorization.

1630856431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1630856431 is about 40383.8634976893. The cubic root of 1630856431 is about 1177.0780022930.

The spelling of 1630856431 in words is "one billion, six hundred thirty million, eight hundred fifty-six thousand, four hundred thirty-one".