61156404 has 48 divisors (see below), whose sum is σ = 161170240. Its totient is φ = 20049120.

The previous prime is 61156399. The next prime is 61156411. The reversal of 61156404 is 40465116.

61156404 is a `hidden beast` number, since 6 + 1 + 15 + 640 + 4 = 666.

It is a super-2 number, since 2×61156404² = 7480211500422432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 1947 + ... + 11229.

Almost surely, 2^61156404 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 61156404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80585120).

61156404 is an abundant number, since it is smaller than the sum of its proper divisors (100013836).

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

61156404 is a wasteful number, since it uses less digits than its factorization.

61156404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9357 (or 9349 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 61156404 is about 7820.2560060397. The cubic root of 61156404 is about 393.9858704682.

The spelling of 61156404 in words is "sixty-one million, one hundred fifty-six thousand, four hundred four".