816401011 has 8 divisors (see below), whose sum is σ = 848184480. Its totient is φ = 784859712.

The previous prime is 816400973. The next prime is 816401021. The reversal of 816401011 is 110104618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 816401011 - 2¹¹ = 816398963 is a prime.

It is a super-2 number, since 2×816401011² = 1333021221523644242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816401021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53655 + ... + 67168.

It is an arithmetic number, because the mean of its divisors is an integer number (106023060).

Almost surely, 2^816401011 is an apocalyptic number.

816401011 is a deficient number, since it is larger than the sum of its proper divisors (31783469).

816401011 is a wasteful number, since it uses less digits than its factorization.

816401011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121085.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 816401011 is about 28572.7319484854. The cubic root of 816401011 is about 934.6187970087.

Adding to 816401011 its reverse (110104618), we get a palindrome (926505629).

The spelling of 816401011 in words is "eight hundred sixteen million, four hundred one thousand, eleven".