1061641491 has 8 divisors (see below), whose sum is σ = 1448441280. Its totient is φ = 691301352.

The previous prime is 1061641489. The next prime is 1061641501. The reversal of 1061641491 is 1941461601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1061641491 - 2¹ = 1061641489 is a prime.

It is a super-2 number, since 2×1061641491² = 2254165310825406162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1061641411) 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, 4114761 + ... + 4115018.

It is an arithmetic number, because the mean of its divisors is an integer number (181055160).

Almost surely, 2^1061641491 is an apocalyptic number.

1061641491 is a deficient number, since it is larger than the sum of its proper divisors (386799789).

1061641491 is an equidigital number, since it uses as much as digits as its factorization.

1061641491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8229825.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1061641491 is about 32582.8404378747. The cubic root of 1061641491 is about 1020.1388670986.

The spelling of 1061641491 in words is "one billion, sixty-one million, six hundred forty-one thousand, four hundred ninety-one".