80156204640 has 192 divisors, whose sum is σ = 281073481920. Its totient is φ = 21334855680.

The previous prime is 80156204573. The next prime is 80156204641. The reversal of 80156204640 is 4640265108.

80156204640 is a `hidden beast` number, since 8 + 0 + 1 + 5 + 6 + 2 + 0 + 4 + 640 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 80156204595 and 80156204604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80156204641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2319972 + ... + 2354268.

It is an arithmetic number, because the mean of its divisors is an integer number (1463924385).

Almost surely, 2^80156204640 is an apocalyptic number.

80156204640 is a gapful number since it is divisible by the number (80) 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 80156204640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140536740960).

80156204640 is an abundant number, since it is smaller than the sum of its proper divisors (200917277280).

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

80156204640 is a wasteful number, since it uses less digits than its factorization.

80156204640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34862 (or 34848 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 80156204640 its reverse (4640265108), we get a palindrome (84796469748).

The spelling of 80156204640 in words is "eighty billion, one hundred fifty-six million, two hundred four thousand, six hundred forty".