7836401521 has 8 divisors (see below), whose sum is σ = 8443056384. Its totient is φ = 7230297360.

The previous prime is 7836401497. The next prime is 7836401533. The reversal of 7836401521 is 1251046387.

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

It is not a de Polignac number, because 7836401521 - 2⁷ = 7836401393 is a prime.

It is a super-2 number, since 2×7836401521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7836441521) 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, 107875 + ... + 165256.

It is an arithmetic number, because the mean of its divisors is an integer number (1055382048).

Almost surely, 2^7836401521 is an apocalyptic number.

It is an amenable number.

7836401521 is a deficient number, since it is larger than the sum of its proper divisors (606654863).

7836401521 is a wasteful number, since it uses less digits than its factorization.

7836401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275351.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 7836401521 is about 88523.4518136296. The cubic root of 7836401521 is about 1986.2727908397.

The spelling of 7836401521 in words is "seven billion, eight hundred thirty-six million, four hundred one thousand, five hundred twenty-one".