820067877545 has 16 divisors (see below), whose sum is σ = 1124905415040. Its totient is φ = 562211810304.

The previous prime is 820067877529. The next prime is 820067877557. The reversal of 820067877545 is 545778760028.

It is a cyclic number.

It is not a de Polignac number, because 820067877545 - 2⁴ = 820067877529 is a prime.

It is a super-2 number, since 2×820067877545² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343455 + ... + 2670564.

It is an arithmetic number, because the mean of its divisors is an integer number (70306588440).

Almost surely, 2^820067877545 is an apocalyptic number.

It is an amenable number.

820067877545 is a deficient number, since it is larger than the sum of its proper divisors (304837537495).

820067877545 is a wasteful number, since it uses less digits than its factorization.

820067877545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018704.

The product of its (nonzero) digits is 26342400, while the sum is 59.

The spelling of 820067877545 in words is "eight hundred twenty billion, sixty-seven million, eight hundred seventy-seven thousand, five hundred forty-five".