153942820417 has 4 divisors (see below), whose sum is σ = 157697523396. Its totient is φ = 150188117440.

The previous prime is 153942820399. The next prime is 153942820481. The reversal of 153942820417 is 714028249351.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22046013441 + 131896806976 = 148479^2 + 363176^2 .

It is a cyclic number.

It is not a de Polignac number, because 153942820417 - 2¹¹ = 153942818369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153942820217) 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, 1877351428 + ... + 1877351509.

It is an arithmetic number, because the mean of its divisors is an integer number (39424380849).

Almost surely, 2^153942820417 is an apocalyptic number.

It is an amenable number.

153942820417 is a deficient number, since it is larger than the sum of its proper divisors (3754702979).

153942820417 is an equidigital number, since it uses as much as digits as its factorization.

153942820417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3754702978.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 153942820417 in words is "one hundred fifty-three billion, nine hundred forty-two million, eight hundred twenty thousand, four hundred seventeen".