61898655 has 64 divisors (see below), whose sum is σ = 123153408. Its totient is φ = 25850880.

The previous prime is 61898651. The next prime is 61898689. The reversal of 61898655 is 55689816.

It is not a de Polignac number, because 61898655 - 2² = 61898651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61898651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186840 + ... + 187170.

It is an arithmetic number, because the mean of its divisors is an integer number (1924272).

Almost surely, 2^61898655 is an apocalyptic number.

61898655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61898655 is a deficient number, since it is larger than the sum of its proper divisors (61254753).

61898655 is a wasteful number, since it uses less digits than its factorization.

61898655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496.

The product of its digits is 518400, while the sum is 48.

The square root of 61898655 is about 7867.5698280981. The cubic root of 61898655 is about 395.5733914647.

The spelling of 61898655 in words is "sixty-one million, eight hundred ninety-eight thousand, six hundred fifty-five".