61001105651 has 4 divisors (see below), whose sum is σ = 61002172512. Its totient is φ = 61000038792.

The previous prime is 61001105611. The next prime is 61001105677. The reversal of 61001105651 is 15650110016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61001105651 - 2¹⁰ = 61001104627 is a prime.

It is a super-2 number, since 2×61001105651² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 61001105651.

It is not an unprimeable number, because it can be changed into a prime (61001105611) 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 3 ways as a sum of consecutive naturals, for example, 442496 + ... + 563741.

It is an arithmetic number, because the mean of its divisors is an integer number (15250543128).

Almost surely, 2^61001105651 is an apocalyptic number.

61001105651 is a deficient number, since it is larger than the sum of its proper divisors (1066861).

61001105651 is a wasteful number, since it uses less digits than its factorization.

61001105651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066860.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 61001105651 its reverse (15650110016), we get a palindrome (76651215667).

The spelling of 61001105651 in words is "sixty-one billion, one million, one hundred five thousand, six hundred fifty-one".