7642491431 has 4 divisors (see below), whose sum is σ = 7643040864. Its totient is φ = 7641942000.

The previous prime is 7642491419. The next prime is 7642491449. The reversal of 7642491431 is 1341942467.

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 7642491431 - 2²² = 7638297127 is a prime.

It is a super-3 number, since 3×7642491431³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7642491631) 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 3 ways as a sum of consecutive naturals, for example, 253295 + ... + 281856.

It is an arithmetic number, because the mean of its divisors is an integer number (1910760216).

Almost surely, 2^7642491431 is an apocalyptic number.

7642491431 is a deficient number, since it is larger than the sum of its proper divisors (549433).

7642491431 is a wasteful number, since it uses less digits than its factorization.

7642491431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549432.

The product of its digits is 145152, while the sum is 41.

The square root of 7642491431 is about 87421.3442529912. The cubic root of 7642491431 is about 1969.7524688345.

The spelling of 7642491431 in words is "seven billion, six hundred forty-two million, four hundred ninety-one thousand, four hundred thirty-one".