36611956861 has 4 divisors (see below), whose sum is σ = 36613984192. Its totient is φ = 36609929532.

The previous prime is 36611956831. The next prime is 36611956873. The reversal of 36611956861 is 16865911663.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16865911663 = 283 ⋅59596861.

It is a cyclic number.

It is not a de Polignac number, because 36611956861 - 2²¹ = 36609859709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36611956799 and 36611956808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36611956831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986331 + ... + 1022776.

It is an arithmetic number, because the mean of its divisors is an integer number (9153496048).

Almost surely, 2^36611956861 is an apocalyptic number.

It is an amenable number.

36611956861 is a deficient number, since it is larger than the sum of its proper divisors (2027331).

36611956861 is a wasteful number, since it uses less digits than its factorization.

36611956861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027330.

The product of its digits is 1399680, while the sum is 52.

The spelling of 36611956861 in words is "thirty-six billion, six hundred eleven million, nine hundred fifty-six thousand, eight hundred sixty-one".