61882015917 has 4 divisors (see below), whose sum is σ = 82509354560. Its totient is φ = 41254677276.

The previous prime is 61882015889. The next prime is 61882015963. The reversal of 61882015917 is 71951028816.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61882015917 - 2³⁴ = 44702146733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61882015967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10313669317 + ... + 10313669322.

It is an arithmetic number, because the mean of its divisors is an integer number (20627338640).

Almost surely, 2^61882015917 is an apocalyptic number.

It is an amenable number.

61882015917 is a deficient number, since it is larger than the sum of its proper divisors (20627338643).

61882015917 is a wasteful number, since it uses less digits than its factorization.

61882015917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20627338642.

The product of its (nonzero) digits is 241920, while the sum is 48.

The spelling of 61882015917 in words is "sixty-one billion, eight hundred eighty-two million, fifteen thousand, nine hundred seventeen".