36436430121661 has 4 divisors (see below), whose sum is σ = 36518679400032. Its totient is φ = 36354180843292.

The previous prime is 36436430121649. The next prime is 36436430121697. The reversal of 36436430121661 is 16612103463463.

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 a cyclic number.

It is not a de Polignac number, because 36436430121661 - 2²³ = 36436421733053 is a prime.

It is a super-2 number, since 2×36436430121661² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36436430121961) 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, 41124638521 + ... + 41124639406.

It is an arithmetic number, because the mean of its divisors is an integer number (9129669850008).

Almost surely, 2^{36436430121661} is an apocalyptic number.

It is an amenable number.

36436430121661 is a deficient number, since it is larger than the sum of its proper divisors (82249278371).

36436430121661 is an equidigital number, since it uses as much as digits as its factorization.

36436430121661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82249278370.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 36436430121661 in words is "thirty-six trillion, four hundred thirty-six billion, four hundred thirty million, one hundred twenty-one thousand, six hundred sixty-one".