3156421632 has 264 divisors, whose sum is σ = 10545914736. Its totient is φ = 831946752.

The previous prime is 3156421621. The next prime is 3156421661. The reversal of 3156421632 is 2361246513.

It is a junction number, because it is equal to n+sod(n) for n = 3156421593 and 3156421602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1956058 + ... + 1957670.

Almost surely, 2^3156421632 is an apocalyptic number.

3156421632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3156421632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5272957368).

3156421632 is an abundant number, since it is smaller than the sum of its proper divisors (7389493104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3156421632 is a wasteful number, since it uses less digits than its factorization.

3156421632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663 (or 1638 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 3156421632 is about 56182.0401195969. The cubic root of 3156421632 is about 1466.8926652659.

The spelling of 3156421632 in words is "three billion, one hundred fifty-six million, four hundred twenty-one thousand, six hundred thirty-two".