161606101516545 has 32 divisors (see below), whose sum is σ = 295784734452480. Its totient is φ = 73807966344960.

The previous prime is 161606101516537. The next prime is 161606101516567. The reversal of 161606101516545 is 545615101606161.

It is not a de Polignac number, because 161606101516545 - 2³ = 161606101516537 is a prime.

It is a super-2 number, since 2×161606101516545² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606101516494 and 161606101516503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 719768826 + ... + 719993315.

It is an arithmetic number, because the mean of its divisors is an integer number (9243272951640).

Almost surely, 2^{161606101516545} is an apocalyptic number.

161606101516545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161606101516545 is a deficient number, since it is larger than the sum of its proper divisors (134178632935935).

161606101516545 is a wasteful number, since it uses less digits than its factorization.

161606101516545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439763225.

The product of its (nonzero) digits is 648000, while the sum is 48.

The spelling of 161606101516545 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred one million, five hundred sixteen thousand, five hundred forty-five".