161651505416 has 16 divisors (see below), whose sum is σ = 308233803600. Its totient is φ = 79455824464.

The previous prime is 161651505413. The next prime is 161651505427. The reversal of 161651505416 is 614505156161.

It is a happy number.

It is a super-2 number, since 2×161651505416² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161651505413) 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, 171240530 + ... + 171241473.

It is an arithmetic number, because the mean of its divisors is an integer number (19264612725).

Almost surely, 2^161651505416 is an apocalyptic number.

It is an amenable number.

161651505416 is a deficient number, since it is larger than the sum of its proper divisors (146582298184).

161651505416 is a wasteful number, since it uses less digits than its factorization.

161651505416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342482068 (or 342482064 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 161651505416 in words is "one hundred sixty-one billion, six hundred fifty-one million, five hundred five thousand, four hundred sixteen".