101601513551 has 4 divisors (see below), whose sum is σ = 101635170600. Its totient is φ = 101567856504.

The previous prime is 101601513529. The next prime is 101601513569. The reversal of 101601513551 is 155315106101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155315106101 = 769 ⋅201970229.

It is a cyclic number.

It is not a de Polignac number, because 101601513551 - 2¹⁰ = 101601512527 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 (101601513511) 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, 16823996 + ... + 16830033.

It is an arithmetic number, because the mean of its divisors is an integer number (25408792650).

Almost surely, 2^101601513551 is an apocalyptic number.

101601513551 is a deficient number, since it is larger than the sum of its proper divisors (33657049).

101601513551 is an equidigital number, since it uses as much as digits as its factorization.

101601513551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33657048.

The product of its (nonzero) digits is 2250, while the sum is 29.

Adding to 101601513551 its reverse (155315106101), we get a palindrome (256916619652).

The spelling of 101601513551 in words is "one hundred one billion, six hundred one million, five hundred thirteen thousand, five hundred fifty-one".