61812583761 has 8 divisors (see below), whose sum is σ = 82431631744. Its totient is φ = 41200962480.

The previous prime is 61812583753. The next prime is 61812583769. The reversal of 61812583761 is 16738521816.

It is an interprime number because it is at equal distance from previous prime (61812583753) and next prime (61812583769).

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

It is not a de Polignac number, because 61812583761 - 2³ = 61812583753 is a prime.

It is a super-2 number, since 2×61812583761² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61812583761.

It is not an unprimeable number, because it can be changed into a prime (61812583769) 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, 1837225 + ... + 1870566.

It is an arithmetic number, because the mean of its divisors is an integer number (10303953968).

Almost surely, 2^61812583761 is an apocalyptic number.

It is an amenable number.

61812583761 is a deficient number, since it is larger than the sum of its proper divisors (20619047983).

61812583761 is a wasteful number, since it uses less digits than its factorization.

61812583761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713351.

The product of its digits is 483840, while the sum is 48.

The spelling of 61812583761 in words is "sixty-one billion, eight hundred twelve million, five hundred eighty-three thousand, seven hundred sixty-one".