61001100061 has 16 divisors (see below), whose sum is σ = 68860468800. Its totient is φ = 53528428800.

The previous prime is 61001100029. The next prime is 61001100067. The reversal of 61001100061 is 16000110016.

It is not a de Polignac number, because 61001100061 - 2⁵ = 61001100029 is a prime.

It is a super-2 number, since 2×61001100061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001100067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216006 + ... + 1265176.

It is an arithmetic number, because the mean of its divisors is an integer number (4303779300).

Almost surely, 2^61001100061 is an apocalyptic number.

It is an amenable number.

61001100061 is a deficient number, since it is larger than the sum of its proper divisors (7859368739).

61001100061 is a wasteful number, since it uses less digits than its factorization.

61001100061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53100.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 61001100061 its reverse (16000110016), we get a palindrome (77001210077).

The spelling of 61001100061 in words is "sixty-one billion, one million, one hundred thousand, sixty-one".