61801869 has 8 divisors (see below), whose sum is σ = 83957472. Its totient is φ = 40423760.

The previous prime is 61801853. The next prime is 61801891. The reversal of 61801869 is 96810816.

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

It is a cyclic number.

It is not a de Polignac number, because 61801869 - 2⁴ = 61801853 is a prime.

It is a super-2 number, since 2×61801869² = 7638942023786322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61801819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194187 + ... + 194504.

It is an arithmetic number, because the mean of its divisors is an integer number (10494684).

Almost surely, 2^61801869 is an apocalyptic number.

It is an amenable number.

61801869 is a deficient number, since it is larger than the sum of its proper divisors (22155603).

61801869 is a wasteful number, since it uses less digits than its factorization.

61801869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388747.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 61801869 is about 7861.4164754197. The cubic root of 61801869 is about 395.3671083689.

The spelling of 61801869 in words is "sixty-one million, eight hundred one thousand, eight hundred sixty-nine".