61855870 has 8 divisors (see below), whose sum is σ = 111340584. Its totient is φ = 24742344.

The previous prime is 61855867. The next prime is 61855879. The reversal of 61855870 is 7855816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61855870² = 7652297306913800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61855879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3092784 + ... + 3092803.

It is an arithmetic number, because the mean of its divisors is an integer number (13917573).

Almost surely, 2^61855870 is an apocalyptic number.

61855870 is a deficient number, since it is larger than the sum of its proper divisors (49484714).

61855870 is a wasteful number, since it uses less digits than its factorization.

61855870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6185594.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 61855870 is about 7864.8502846526. The cubic root of 61855870 is about 395.4822289640.

The spelling of 61855870 in words is "sixty-one million, eight hundred fifty-five thousand, eight hundred seventy".