161403535030501 has 4 divisors (see below), whose sum is σ = 161403562043104. Its totient is φ = 161403508017900.

The previous prime is 161403535030481. The next prime is 161403535030511. The reversal of 161403535030501 is 105030535304161.

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.

It is a cyclic number.

It is not a de Polignac number, because 161403535030501 - 2⁷ = 161403535030373 is a prime.

It is a super-2 number, since 2×161403535030501² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161403535030511) 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, 123435 + ... + 17967256.

It is an arithmetic number, because the mean of its divisors is an integer number (40350890510776).

Almost surely, 2^{161403535030501} is an apocalyptic number.

It is an amenable number.

161403535030501 is a deficient number, since it is larger than the sum of its proper divisors (27012603).

161403535030501 is an equidigital number, since it uses as much as digits as its factorization.

161403535030501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27012602.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 161403535030501 in words is "one hundred sixty-one trillion, four hundred three billion, five hundred thirty-five million, thirty thousand, five hundred one".