80661155601 has 32 divisors (see below), whose sum is σ = 123587175040. Its totient is φ = 46380916224.

The previous prime is 80661155581. The next prime is 80661155609. The reversal of 80661155601 is 10655116608.

It is not a de Polignac number, because 80661155601 - 2¹⁴ = 80661139217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 80661155601.

It is not an unprimeable number, because it can be changed into a prime (80661155609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691486 + ... + 799671.

It is an arithmetic number, because the mean of its divisors is an integer number (3862099220).

Almost surely, 2^80661155601 is an apocalyptic number.

It is an amenable number.

80661155601 is a deficient number, since it is larger than the sum of its proper divisors (42926019439).

80661155601 is a wasteful number, since it uses less digits than its factorization.

80661155601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491265.

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 80661155601 in words is "eighty billion, six hundred sixty-one million, one hundred fifty-five thousand, six hundred one".