7640161637 has 8 divisors (see below), whose sum is σ = 7889483520. Its totient is φ = 7391018880.

The previous prime is 7640161619. The next prime is 7640161663. The reversal of 7640161637 is 7361610467.

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 7640161637 - 2¹² = 7640157541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7640161594 and 7640161603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640161937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44789 + ... + 131477.

It is an arithmetic number, because the mean of its divisors is an integer number (986185440).

Almost surely, 2^7640161637 is an apocalyptic number.

It is an amenable number.

7640161637 is a deficient number, since it is larger than the sum of its proper divisors (249321883).

7640161637 is a wasteful number, since it uses less digits than its factorization.

7640161637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89563.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 7640161637 is about 87408.0181505107. The cubic root of 7640161637 is about 1969.5522904882.

The spelling of 7640161637 in words is "seven billion, six hundred forty million, one hundred sixty-one thousand, six hundred thirty-seven".