7640154421 has 16 divisors (see below), whose sum is σ = 8129341440. Its totient is φ = 7164277120.

The previous prime is 7640154397. The next prime is 7640154469. The reversal of 7640154421 is 1244510467.

It is not a de Polignac number, because 7640154421 - 2⁹ = 7640153909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640154481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2571825 + ... + 2574793.

It is an arithmetic number, because the mean of its divisors is an integer number (508083840).

Almost surely, 2^7640154421 is an apocalyptic number.

It is an amenable number.

7640154421 is a deficient number, since it is larger than the sum of its proper divisors (489187019).

7640154421 is a wasteful number, since it uses less digits than its factorization.

7640154421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 7640154421 is about 87407.9768728232. The cubic root of 7640154421 is about 1969.5516704187.

Adding to 7640154421 its reverse (1244510467), we get a palindrome (8884664888).

The spelling of 7640154421 in words is "seven billion, six hundred forty million, one hundred fifty-four thousand, four hundred twenty-one".