61734606840 has 112 divisors (see below), whose sum is σ = 208259127000. Its totient is φ = 16462554048.

The previous prime is 61734606809. The next prime is 61734606847. The reversal of 61734606840 is 4860643716.

It is a happy number.

61734606840 is a `hidden beast` number, since 6 + 1 + 7 + 34 + 606 + 8 + 4 + 0 = 666.

It is a super-2 number, since 2×61734606840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61734606847) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1029390 + ... + 1087709.

Almost surely, 2^61734606840 is an apocalyptic number.

61734606840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61734606840 is an abundant number, since it is smaller than the sum of its proper divisors (146524520160).

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

61734606840 is a wasteful number, since it uses less digits than its factorization.

61734606840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117128 (or 2117109 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 61734606840 in words is "sixty-one billion, seven hundred thirty-four million, six hundred six thousand, eight hundred forty".