161605651502 has 16 divisors (see below), whose sum is σ = 253092892032. Its totient is φ = 77245379640.

The previous prime is 161605651477. The next prime is 161605651511. The reversal of 161605651502 is 205156506161.

It is a happy number.

It is a super-2 number, since 2×161605651502² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925124 + ... + 1085847.

It is an arithmetic number, because the mean of its divisors is an integer number (15818305752).

Almost surely, 2^161605651502 is an apocalyptic number.

161605651502 is a deficient number, since it is larger than the sum of its proper divisors (91487240530).

161605651502 is a wasteful number, since it uses less digits than its factorization.

161605651502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012743.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 161605651502 in words is "one hundred sixty-one billion, six hundred five million, six hundred fifty-one thousand, five hundred two".