154690374217 has 4 divisors (see below), whose sum is σ = 162831972880. Its totient is φ = 146548775556.

The previous prime is 154690374187. The next prime is 154690374227. The reversal of 154690374217 is 712473096451.

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: 712473096451 = 266297 ⋅2675483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154690374217 is a prime.

It is a super-2 number, since 2×154690374217² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154690374227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4070799303 + ... + 4070799340.

It is an arithmetic number, because the mean of its divisors is an integer number (40707993220).

Almost surely, 2^154690374217 is an apocalyptic number.

It is an amenable number.

154690374217 is a deficient number, since it is larger than the sum of its proper divisors (8141598663).

154690374217 is an equidigital number, since it uses as much as digits as its factorization.

154690374217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8141598662.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 154690374217 in words is "one hundred fifty-four billion, six hundred ninety million, three hundred seventy-four thousand, two hundred seventeen".