64127491 has 8 divisors (see below), whose sum is σ = 66260480. Its totient is φ = 62023752.

The previous prime is 64127461. The next prime is 64127501. The reversal of 64127491 is 19472146.

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 64127491 - 2¹¹ = 64125443 is a prime.

It is a super-2 number, since 2×64127491² = 8224670203910162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64127461) 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, 2811 + ... + 11668.

It is an arithmetic number, because the mean of its divisors is an integer number (8282560).

Almost surely, 2^64127491 is an apocalyptic number.

64127491 is a deficient number, since it is larger than the sum of its proper divisors (2132989).

64127491 is a wasteful number, since it uses less digits than its factorization.

64127491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14625.

The product of its digits is 12096, while the sum is 34.

The square root of 64127491 is about 8007.9642231968. The cubic root of 64127491 is about 400.2654300782.

The spelling of 64127491 in words is "sixty-four million, one hundred twenty-seven thousand, four hundred ninety-one".