101640305261 has 8 divisors (see below), whose sum is σ = 115701217344. Its totient is φ = 88382873920.

The previous prime is 101640305243. The next prime is 101640305311. The reversal of 101640305261 is 162503046101.

It is a happy number.

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

It is not a de Polignac number, because 101640305261 - 2⁶ = 101640305197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101640325261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200869916 + ... + 200870421.

It is an arithmetic number, because the mean of its divisors is an integer number (14462652168).

Almost surely, 2^101640305261 is an apocalyptic number.

101640305261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101640305261 is a deficient number, since it is larger than the sum of its proper divisors (14060912083).

101640305261 is a wasteful number, since it uses less digits than its factorization.

101640305261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401740371.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 101640305261 in words is "one hundred one billion, six hundred forty million, three hundred five thousand, two hundred sixty-one".