1577928940872 has 16 divisors (see below), whose sum is σ = 3944822352240. Its totient is φ = 525976313616.

The previous prime is 1577928940817. The next prime is 1577928940877. The reversal of 1577928940872 is 2780498297751.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1577928940797 and 1577928940806.

It is not an unprimeable number, because it can be changed into a prime (1577928940877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32873519578 + ... + 32873519625.

It is an arithmetic number, because the mean of its divisors is an integer number (246551397015).

Almost surely, 2^{1577928940872} is an apocalyptic number.

1577928940872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1577928940872 is an abundant number, since it is smaller than the sum of its proper divisors (2366893411368).

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

1577928940872 is a wasteful number, since it uses less digits than its factorization.

1577928940872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65747039212 (or 65747039208 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 69.

The spelling of 1577928940872 in words is "one trillion, five hundred seventy-seven billion, nine hundred twenty-eight million, nine hundred forty thousand, eight hundred seventy-two".