61635252101 has 4 divisors (see below), whose sum is σ = 61806938400. Its totient is φ = 61463565804.

The previous prime is 61635252083. The next prime is 61635252113. The reversal of 61635252101 is 10125253616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61635252101 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 (61635252181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85842611 + ... + 85843328.

It is an arithmetic number, because the mean of its divisors is an integer number (15451734600).

Almost surely, 2^61635252101 is an apocalyptic number.

It is an amenable number.

61635252101 is a deficient number, since it is larger than the sum of its proper divisors (171686299).

61635252101 is a wasteful number, since it uses less digits than its factorization.

61635252101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171686298.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 61635252101 in words is "sixty-one billion, six hundred thirty-five million, two hundred fifty-two thousand, one hundred one".