161102231640 has 320 divisors, whose sum is σ = 628079443200. Its totient is φ = 36273422592.

The previous prime is 161102231621. The next prime is 161102231659. The reversal of 161102231640 is 46132201161.

It is a happy number.

161102231640 is a `hidden beast` number, since 1 + 6 + 1 + 10 + 2 + 2 + 3 + 1 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (161102231621) and next prime (161102231659).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1466551 + ... + 1572569.

It is an arithmetic number, because the mean of its divisors is an integer number (1962748260).

Almost surely, 2^161102231640 is an apocalyptic number.

161102231640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161102231640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314039721600).

161102231640 is an abundant number, since it is smaller than the sum of its proper divisors (466977211560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161102231640 is a wasteful number, since it uses less digits than its factorization.

161102231640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106116 (or 106103 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 161102231640 in words is "one hundred sixty-one billion, one hundred two million, two hundred thirty-one thousand, six hundred forty".