4172491640 has 64 divisors (see below), whose sum is σ = 9850800960. Its totient is φ = 1587548160.

The previous prime is 4172491613. The next prime is 4172491669. The reversal of 4172491640 is 461942714.

It is a junction number, because it is equal to n+sod(n) for n = 4172491594 and 4172491603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153992 + ... + 179048.

It is an arithmetic number, because the mean of its divisors is an integer number (153918765).

Almost surely, 2^4172491640 is an apocalyptic number.

4172491640 is a gapful number since it is divisible by the number (40) 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 4172491640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4925400480).

4172491640 is an abundant number, since it is smaller than the sum of its proper divisors (5678309320).

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

4172491640 is a wasteful number, since it uses less digits than its factorization.

4172491640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25272 (or 25268 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 4172491640 is about 64594.8267278425. The cubic root of 4172491640 is about 1609.8984851699.

The spelling of 4172491640 in words is "four billion, one hundred seventy-two million, four hundred ninety-one thousand, six hundred forty".