7540644431 has 8 divisors (see below), whose sum is σ = 7603622400. Its totient is φ = 7477723008.

The previous prime is 7540644379. The next prime is 7540644443. The reversal of 7540644431 is 1344460457.

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

It is a cyclic number.

It is not a de Polignac number, because 7540644431 - 2⁶ = 7540644367 is a prime.

It is a super-2 number, since 2×7540644431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540644481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278795 + ... + 304643.

It is an arithmetic number, because the mean of its divisors is an integer number (950452800).

Almost surely, 2^7540644431 is an apocalyptic number.

7540644431 is a deficient number, since it is larger than the sum of its proper divisors (62977969).

7540644431 is a wasteful number, since it uses less digits than its factorization.

7540644431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28273.

The product of its (nonzero) digits is 161280, while the sum is 38.

The square root of 7540644431 is about 86836.8840470454. The cubic root of 7540644431 is about 1960.9633982945.

The spelling of 7540644431 in words is "seven billion, five hundred forty million, six hundred forty-four thousand, four hundred thirty-one".