121677353566618 has 32 divisors (see below), whose sum is σ = 191087894914560. Its totient is φ = 58032040584000.

The previous prime is 121677353566609. The next prime is 121677353566667. The reversal of 121677353566618 is 816665353776121.

It is a super-2 number, since 2×121677353566618² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317710743 + ... + 318093493.

It is an arithmetic number, because the mean of its divisors is an integer number (5971496716080).

Almost surely, 2^{121677353566618} is an apocalyptic number.

121677353566618 is a deficient number, since it is larger than the sum of its proper divisors (69410541347942).

121677353566618 is a wasteful number, since it uses less digits than its factorization.

121677353566618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448902.

The product of its digits is 228614400, while the sum is 67.

The spelling of 121677353566618 in words is "one hundred twenty-one trillion, six hundred seventy-seven billion, three hundred fifty-three million, five hundred sixty-six thousand, six hundred eighteen".