61156144 has 40 divisors (see below), whose sum is σ = 135843488. Its totient is φ = 26127360.

The previous prime is 61156129. The next prime is 61156163. The reversal of 61156144 is 44165116.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46504 + ... + 47800.

Almost surely, 2^61156144 is an apocalyptic number.

It is an amenable number.

61156144 is an abundant number, since it is smaller than the sum of its proper divisors (74687344).

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

61156144 is a wasteful number, since it uses less digits than its factorization.

61156144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733 (or 1727 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 61156144 is about 7820.2393825253. The cubic root of 61156144 is about 393.9853121377.

The spelling of 61156144 in words is "sixty-one million, one hundred fifty-six thousand, one hundred forty-four".