16154072820 has 72 divisors (see below), whose sum is σ = 49085926344. Its totient is φ = 4300259328.

The previous prime is 16154072807. The next prime is 16154072881. The reversal of 16154072820 is 2827045161.

It can be written as a sum of positive squares in 4 ways, for example, as 7650651024 + 8503421796 = 87468^2 + 92214^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26092 + ... + 181628.

It is an arithmetic number, because the mean of its divisors is an integer number (681748977).

Almost surely, 2^16154072820 is an apocalyptic number.

16154072820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16154072820 is an abundant number, since it is smaller than the sum of its proper divisors (32931853524).

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

16154072820 is a wasteful number, since it uses less digits than its factorization.

16154072820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156129 (or 156124 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 16154072820 in words is "sixteen billion, one hundred fifty-four million, seventy-two thousand, eight hundred twenty".