61001111054 has 16 divisors (see below), whose sum is σ = 100155672960. Its totient is φ = 27692811360.

The previous prime is 61001111021. The next prime is 61001111099. The reversal of 61001111054 is 45011110016.

It is a happy number.

It is a super-2 number, since 2×61001111054² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19229534 + ... + 19232705.

It is an arithmetic number, because the mean of its divisors is an integer number (6259729560).

Almost surely, 2^61001111054 is an apocalyptic number.

61001111054 is a deficient number, since it is larger than the sum of its proper divisors (39154561906).

61001111054 is a wasteful number, since it uses less digits than its factorization.

61001111054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38462315.

The product of its (nonzero) digits is 120, while the sum is 20.

The spelling of 61001111054 in words is "sixty-one billion, one million, one hundred eleven thousand, fifty-four".