153604042661 has 4 divisors (see below), whose sum is σ = 153782860800. Its totient is φ = 153425224524.

The previous prime is 153604042649. The next prime is 153604042663. The reversal of 153604042661 is 166240406351.

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: 166240406351 = 137 ⋅1213433623.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153604042661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153604042663) 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, 89407781 + ... + 89409498.

It is an arithmetic number, because the mean of its divisors is an integer number (38445715200).

Almost surely, 2^153604042661 is an apocalyptic number.

It is an amenable number.

153604042661 is a deficient number, since it is larger than the sum of its proper divisors (178818139).

153604042661 is an equidigital number, since it uses as much as digits as its factorization.

153604042661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178818138.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 153604042661 in words is "one hundred fifty-three billion, six hundred four million, forty-two thousand, six hundred sixty-one".