725178811 has 4 divisors (see below), whose sum is σ = 828775792. Its totient is φ = 621581832.

The previous prime is 725178787. The next prime is 725178821. The reversal of 725178811 is 118871527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725178811 - 2¹¹ = 725176763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725178821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51798480 + ... + 51798493.

It is an arithmetic number, because the mean of its divisors is an integer number (207193948).

Almost surely, 2^725178811 is an apocalyptic number.

725178811 is a deficient number, since it is larger than the sum of its proper divisors (103596981).

725178811 is a wasteful number, since it uses less digits than its factorization.

725178811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103596980.

The product of its digits is 31360, while the sum is 40.

The square root of 725178811 is about 26929.1442678745. The cubic root of 725178811 is about 898.4247386826.

The spelling of 725178811 in words is "seven hundred twenty-five million, one hundred seventy-eight thousand, eight hundred eleven".