61642289722734 has 24 divisors (see below), whose sum is σ = 152638050742320. Its totient is φ = 17612082777888.

The previous prime is 61642289722733. The next prime is 61642289722751. The reversal of 61642289722734 is 43722798224616.

61642289722734 is a `hidden beast` number, since 6 + 16 + 4 + 2 + 289 + 72 + 273 + 4 = 666.

It is a super-2 number, since 2×61642289722734² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61642289722733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 244612260679 + ... + 244612260930.

It is an arithmetic number, because the mean of its divisors is an integer number (6359918780930).

Almost surely, 2^{61642289722734} is an apocalyptic number.

61642289722734 is an abundant number, since it is smaller than the sum of its proper divisors (90995761019586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61642289722734 is a wasteful number, since it uses less digits than its factorization.

61642289722734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489224521624 (or 489224521621 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

The spelling of 61642289722734 in words is "sixty-one trillion, six hundred forty-two billion, two hundred eighty-nine million, seven hundred twenty-two thousand, seven hundred thirty-four".