61855824 has 40 divisors (see below), whose sum is σ = 160079040. Its totient is φ = 20581888.

The previous prime is 61855817. The next prime is 61855831. The reversal of 61855824 is 42855816.

It is an interprime number because it is at equal distance from previous prime (61855817) and next prime (61855831).

It is a super-2 number, since 2×61855824² = 7652285925437952, which contains 22 as substring.

It is a congruent number.

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, 46237 + ... + 47555.

It is an arithmetic number, because the mean of its divisors is an integer number (4001976).

Almost surely, 2^61855824 is an apocalyptic number.

It is an amenable number.

61855824 is an abundant number, since it is smaller than the sum of its proper divisors (98223216).

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

61855824 is a wasteful number, since it uses less digits than its factorization.

61855824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2301 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 61855824 is about 7864.8473602480. The cubic root of 61855824 is about 395.4821309286.

The spelling of 61855824 in words is "sixty-one million, eight hundred fifty-five thousand, eight hundred twenty-four".