61506156 has 12 divisors (see below), whose sum is σ = 143514392. Its totient is φ = 20502048.

The previous prime is 61506131. The next prime is 61506167. The reversal of 61506156 is 65160516.

It is a tau number, because it is divible by the number of its divisors (12).

It is a zygodrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2562745 + ... + 2562768.

Almost surely, 2^61506156 is an apocalyptic number.

It is an amenable number.

61506156 is an abundant number, since it is smaller than the sum of its proper divisors (82008236).

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

61506156 is a wasteful number, since it uses less digits than its factorization.

61506156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125520 (or 5125518 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 61506156 is about 7842.5860530822. The cubic root of 61506156 is about 394.7355084568.

The spelling of 61506156 in words is "sixty-one million, five hundred six thousand, one hundred fifty-six".