61624869 has 16 divisors (see below), whose sum is σ = 87114240. Its totient is φ = 38681280.

The previous prime is 61624861. The next prime is 61624873. The reversal of 61624869 is 96842616.

It is not a de Polignac number, because 61624869 - 2³ = 61624861 is a prime.

It is a super-3 number, since 3×61624869³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 61624869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61624861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5514 + ... + 12395.

It is an arithmetic number, because the mean of its divisors is an integer number (5444640).

Almost surely, 2^61624869 is an apocalyptic number.

It is an amenable number.

61624869 is a deficient number, since it is larger than the sum of its proper divisors (25489371).

61624869 is a wasteful number, since it uses less digits than its factorization.

61624869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17980.

The product of its digits is 124416, while the sum is 42.

The square root of 61624869 is about 7850.1508902696. The cubic root of 61624869 is about 394.9893048431.

The spelling of 61624869 in words is "sixty-one million, six hundred twenty-four thousand, eight hundred sixty-nine".