61888641 has 8 divisors (see below), whose sum is σ = 83680704. Its totient is φ = 40677840.

The previous prime is 61888633. The next prime is 61888657. The reversal of 61888641 is 14688816.

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

It is not a de Polignac number, because 61888641 - 2³ = 61888633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61888593 and 61888602.

It is not an unprimeable number, because it can be changed into a prime (61888601) 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, 145066 + ... + 145491.

It is an arithmetic number, because the mean of its divisors is an integer number (10460088).

Almost surely, 2^61888641 is an apocalyptic number.

It is an amenable number.

61888641 is a deficient number, since it is larger than the sum of its proper divisors (21792063).

61888641 is a wasteful number, since it uses less digits than its factorization.

61888641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290631.

The product of its digits is 73728, while the sum is 42.

The square root of 61888641 is about 7866.9333923709. The cubic root of 61888641 is about 395.5520582839.

The spelling of 61888641 in words is "sixty-one million, eight hundred eighty-eight thousand, six hundred forty-one".