36618401 has 4 divisors (see below), whose sum is σ = 36638400. Its totient is φ = 36598404.

The previous prime is 36618397. The next prime is 36618403. The reversal of 36618401 is 10481663.

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: 10481663 = 1567 ⋅6689.

It is a cyclic number.

It is not a de Polignac number, because 36618401 - 2² = 36618397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36618403) 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, 6941 + ... + 11018.

It is an arithmetic number, because the mean of its divisors is an integer number (9159600).

Almost surely, 2^36618401 is an apocalyptic number.

It is an amenable number.

36618401 is a deficient number, since it is larger than the sum of its proper divisors (19999).

36618401 is a wasteful number, since it uses less digits than its factorization.

36618401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19998.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 36618401 is about 6051.3139895398. The cubic root of 36618401 is about 332.0726633666.

The spelling of 36618401 in words is "thirty-six million, six hundred eighteen thousand, four hundred one".