61722115553 has 8 divisors (see below), whose sum is σ = 70542743040. Its totient is φ = 52902283680.

The previous prime is 61722115531. The next prime is 61722115643. The reversal of 61722115553 is 35551122716.

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

It is a cyclic number.

It is not a de Polignac number, because 61722115553 - 2⁸ = 61722115297 is a prime.

It is a super-3 number, since 3×61722115553³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61722115523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22193 + ... + 352046.

It is an arithmetic number, because the mean of its divisors is an integer number (8817842880).

Almost surely, 2^61722115553 is an apocalyptic number.

It is an amenable number.

61722115553 is a deficient number, since it is larger than the sum of its proper divisors (8820627487).

61722115553 is a wasteful number, since it uses less digits than its factorization.

61722115553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397807.

The product of its digits is 63000, while the sum is 38.

The spelling of 61722115553 in words is "sixty-one billion, seven hundred twenty-two million, one hundred fifteen thousand, five hundred fifty-three".