61326291 has 16 divisors (see below), whose sum is σ = 88935840. Its totient is φ = 37363200.

The previous prime is 61326253. The next prime is 61326313. The reversal of 61326291 is 19262316.

It is not a de Polignac number, because 61326291 - 2⁷ = 61326163 is a prime.

It is a super-4 number, since 4×61326291⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (61326491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3846 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (5558490).

Almost surely, 2^61326291 is an apocalyptic number.

61326291 is a deficient number, since it is larger than the sum of its proper divisors (27609549).

61326291 is a wasteful number, since it uses less digits than its factorization.

61326291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15686.

The product of its digits is 3888, while the sum is 30.

The square root of 61326291 is about 7831.1104576554. The cubic root of 61326291 is about 394.3503523031.

The spelling of 61326291 in words is "sixty-one million, three hundred twenty-six thousand, two hundred ninety-one".