80615211840 has 84 divisors (see below), whose sum is σ = 277282748964. Its totient is φ = 21497389056.

The previous prime is 80615211799. The next prime is 80615211863. The reversal of 80615211840 is 4811251608.

80615211840 is a `hidden beast` number, since 8 + 0 + 615 + 21 + 18 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50614200576 + 30001011264 = 224976^2 + 173208^2 .

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 = 80615211795 and 80615211804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13992817 + ... + 13998576.

Almost surely, 2^80615211840 is an apocalyptic number.

80615211840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80615211840 is an abundant number, since it is smaller than the sum of its proper divisors (196667537124).

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

80615211840 is a wasteful number, since it uses less digits than its factorization.

80615211840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27991416 (or 27991403 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 80615211840 in words is "eighty billion, six hundred fifteen million, two hundred eleven thousand, eight hundred forty".