1641269952 has 280 divisors, whose sum is σ = 5743569920. Its totient is φ = 453496320.

The previous prime is 1641269923. The next prime is 1641269957. The reversal of 1641269952 is 2599621461.

It is a junction number, because it is equal to n+sod(n) for n = 1641269898 and 1641269907.

It is not an unprimeable number, because it can be changed into a prime (1641269957) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1124199 + ... + 1125657.

Almost surely, 2^1641269952 is an apocalyptic number.

1641269952 is a gapful number since it is divisible by the number (12) 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 1641269952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2871784960).

1641269952 is an abundant number, since it is smaller than the sum of its proper divisors (4102299968).

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

1641269952 is a wasteful number, since it uses less digits than its factorization.

1641269952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521 (or 1502 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 1641269952 is about 40512.5900430965. The cubic root of 1641269952 is about 1179.5780239705.

The spelling of 1641269952 in words is "one billion, six hundred forty-one million, two hundred sixty-nine thousand, nine hundred fifty-two".