61449670555 has 16 divisors (see below), whose sum is σ = 90756437184. Its totient is φ = 38895615360.

The previous prime is 61449670519. The next prime is 61449670567. The reversal of 61449670555 is 55507694416.

It is a happy number.

It is not a de Polignac number, because 61449670555 - 2¹¹ = 61449668507 is a prime.

It is a super-2 number, since 2×61449670555² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67526656 + ... + 67527565.

It is an arithmetic number, because the mean of its divisors is an integer number (5672277324).

Almost surely, 2^61449670555 is an apocalyptic number.

61449670555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61449670555 is a deficient number, since it is larger than the sum of its proper divisors (29306766629).

61449670555 is a wasteful number, since it uses less digits than its factorization.

61449670555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135054246.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 61449670555 in words is "sixty-one billion, four hundred forty-nine million, six hundred seventy thousand, five hundred fifty-five".