75640631 has 8 divisors (see below), whose sum is σ = 83680128. Its totient is φ = 67795000.

The previous prime is 75640627. The next prime is 75640673. The reversal of 75640631 is 13604657.

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 75640631 - 2² = 75640627 is a prime.

It is a super-2 number, since 2×75640631² = 11443010116156322, which 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 (75640681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47645 + ... + 49206.

It is an arithmetic number, because the mean of its divisors is an integer number (10460016).

Almost surely, 2^75640631 is an apocalyptic number.

75640631 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

75640631 is a deficient number, since it is larger than the sum of its proper divisors (8039497).

75640631 is a wasteful number, since it uses less digits than its factorization.

75640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96933.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 75640631 is about 8697.1622383396. The cubic root of 75640631 is about 422.9136613611.

The spelling of 75640631 in words is "seventy-five million, six hundred forty thousand, six hundred thirty-one".