61156368 has 180 divisors, whose sum is σ = 212397120. Its totient is φ = 16084224.

The previous prime is 61156339. The next prime is 61156369. The reversal of 61156368 is 86365116.

It is a happy number.

61156368 is a `hidden beast` number, since 6 + 1 + 15 + 636 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (61156369) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 170173 + ... + 170531.

It is an arithmetic number, because the mean of its divisors is an integer number (1179984).

Almost surely, 2^61156368 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 61156368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106198560).

61156368 is an abundant number, since it is smaller than the sum of its proper divisors (151240752).

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

61156368 is a wasteful number, since it uses less digits than its factorization.

61156368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 384 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 61156368 is about 7820.2537043244. The cubic root of 61156368 is about 393.9857931610.

The spelling of 61156368 in words is "sixty-one million, one hundred fifty-six thousand, three hundred sixty-eight".