61856532 has 72 divisors (see below), whose sum is σ = 165285120. Its totient is φ = 19474560.

The previous prime is 61856503. The next prime is 61856579. The reversal of 61856532 is 23565816.

61856532 is a `hidden beast` number, since 61 + 8 + 565 + 32 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47344 + ... + 48632.

Almost surely, 2^61856532 is an apocalyptic number.

61856532 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61856532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82642560).

61856532 is an abundant number, since it is smaller than the sum of its proper divisors (103428588).

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

61856532 is a wasteful number, since it uses less digits than its factorization.

61856532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1368 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 61856532 is about 7864.8923705287. The cubic root of 61856532 is about 395.4836398152.

The spelling of 61856532 in words is "sixty-one million, eight hundred fifty-six thousand, five hundred thirty-two".