161655761012547 has 8 divisors (see below), whose sum is σ = 215698000132944. Its totient is φ = 107692014616928.

The previous prime is 161655761012491. The next prime is 161655761012563. The reversal of 161655761012547 is 745210167556161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161655761012547 - 2¹⁶ = 161655760947011 is a prime.

It is a super-2 number, since 2×161655761012547² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161655761012587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19623176388 + ... + 19623184625.

It is an arithmetic number, because the mean of its divisors is an integer number (26962250016618).

Almost surely, 2^{161655761012547} is an apocalyptic number.

161655761012547 is a deficient number, since it is larger than the sum of its proper divisors (54042239120397).

161655761012547 is a wasteful number, since it uses less digits than its factorization.

161655761012547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39246362389.

The product of its (nonzero) digits is 10584000, while the sum is 57.

The spelling of 161655761012547 in words is "one hundred sixty-one trillion, six hundred fifty-five billion, seven hundred sixty-one million, twelve thousand, five hundred forty-seven".