61556142 has 32 divisors (see below), whose sum is σ = 132618240. Its totient is φ = 18992160.

The previous prime is 61556113. The next prime is 61556153. The reversal of 61556142 is 24165516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2917 + ... + 11472.

It is an arithmetic number, because the mean of its divisors is an integer number (4144320).

Almost surely, 2^61556142 is an apocalyptic number.

61556142 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

61556142 is an abundant number, since it is smaller than the sum of its proper divisors (71062098).

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

61556142 is a wasteful number, since it uses less digits than its factorization.

61556142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14448.

The product of its digits is 7200, while the sum is 30.

The square root of 61556142 is about 7845.7722373263. The cubic root of 61556142 is about 394.8424132374.

The spelling of 61556142 in words is "sixty-one million, five hundred fifty-six thousand, one hundred forty-two".