3644121485078 has 16 divisors (see below), whose sum is σ = 5481880842816. Its totient is φ = 1816828273920.

The previous prime is 3644121485077. The next prime is 3644121485113. The reversal of 3644121485078 is 8705841214463.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644121485077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21222275 + ... + 21393297.

It is an arithmetic number, because the mean of its divisors is an integer number (342617552676).

Almost surely, 2^{3644121485078} is an apocalyptic number.

3644121485078 is a deficient number, since it is larger than the sum of its proper divisors (1837759357738).

3644121485078 is a wasteful number, since it uses less digits than its factorization.

3644121485078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201559.

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 3644121485078 in words is "three trillion, six hundred forty-four billion, one hundred twenty-one million, four hundred eighty-five thousand, seventy-eight".