1641100451 has 8 divisors (see below), whose sum is σ = 1645746960. Its totient is φ = 1636461792.

The previous prime is 1641100429. The next prime is 1641100493. The reversal of 1641100451 is 1540011461.

It is a happy number.

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 1641100451 - 2⁶ = 1641100387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1641105451) 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, 798341 + ... + 800393.

It is an arithmetic number, because the mean of its divisors is an integer number (205718370).

Almost surely, 2^1641100451 is an apocalyptic number.

1641100451 is a deficient number, since it is larger than the sum of its proper divisors (4646509).

1641100451 is a wasteful number, since it uses less digits than its factorization.

1641100451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1641100451 is about 40510.4980344602. The cubic root of 1641100451 is about 1179.5374158756.

The spelling of 1641100451 in words is "one billion, six hundred forty-one million, one hundred thousand, four hundred fifty-one".