61291104 has 96 divisors (see below), whose sum is σ = 185149440. Its totient is φ = 17390592.

The previous prime is 61291091. The next prime is 61291117. The reversal of 61291104 is 40119216.

61291104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61291091) and next prime (61291117).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149652 + ... + 150060.

It is an arithmetic number, because the mean of its divisors is an integer number (1928640).

Almost surely, 2^61291104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61291104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92574720).

61291104 is an abundant number, since it is smaller than the sum of its proper divisors (123858336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61291104 is a wasteful number, since it uses less digits than its factorization.

61291104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 61291104 is about 7828.8635190556. The cubic root of 61291104 is about 394.2749161384.

The spelling of 61291104 in words is "sixty-one million, two hundred ninety-one thousand, one hundred four".