61640140601 has 8 divisors (see below), whose sum is σ = 67026173760. Its totient is φ = 56346176592.

The previous prime is 61640140589. The next prime is 61640140607. The reversal of 61640140601 is 10604104616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61640140601 is a prime.

It is a super-2 number, since 2×61640140601² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61640140607) 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, 23015891 + ... + 23018568.

It is an arithmetic number, because the mean of its divisors is an integer number (8378271720).

Almost surely, 2^61640140601 is an apocalyptic number.

It is an amenable number.

61640140601 is a deficient number, since it is larger than the sum of its proper divisors (5386033159).

61640140601 is a wasteful number, since it uses less digits than its factorization.

61640140601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46034575.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 61640140601 in words is "sixty-one billion, six hundred forty million, one hundred forty thousand, six hundred one".