61006005553 has 16 divisors (see below), whose sum is σ = 63200987136. Its totient is φ = 58825609920.

The previous prime is 61006005551. The next prime is 61006005583. The reversal of 61006005553 is 35550060016.

61006005553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61006005553 - 2¹ = 61006005551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61006005551) 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, 11436675 + ... + 11442007.

It is an arithmetic number, because the mean of its divisors is an integer number (3950061696).

Almost surely, 2^61006005553 is an apocalyptic number.

It is an amenable number.

61006005553 is a deficient number, since it is larger than the sum of its proper divisors (2194981583).

61006005553 is a wasteful number, since it uses less digits than its factorization.

61006005553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 61006005553 its reverse (35550060016), we get a palindrome (96556065569).

The spelling of 61006005553 in words is "sixty-one billion, six million, five thousand, five hundred fifty-three".