61553895 has 32 divisors (see below), whose sum is σ = 106444800. Its totient is φ = 30194304.

The previous prime is 61553881. The next prime is 61553897. The reversal of 61553895 is 59835516.

It is not a de Polignac number, because 61553895 - 2⁶ = 61553831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61553897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93076 + ... + 93734.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^61553895 is an apocalyptic number.

61553895 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61553895 is a deficient number, since it is larger than the sum of its proper divisors (44890905).

61553895 is a wasteful number, since it uses less digits than its factorization.

61553895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159.

The product of its digits is 162000, while the sum is 42.

The square root of 61553895 is about 7845.6290378784. The cubic root of 61553895 is about 394.8376088336.

The spelling of 61553895 in words is "sixty-one million, five hundred fifty-three thousand, eight hundred ninety-five".