61324202640 has 160 divisors (see below), whose sum is σ = 198917554176. Its totient is φ = 15598978560.

The previous prime is 61324202627. The next prime is 61324202651. The reversal of 61324202640 is 4620242316.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61324202598 and 61324202607.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2010705 + ... + 2040975.

Almost surely, 2^61324202640 is an apocalyptic number.

61324202640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61324202640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99458777088).

61324202640 is an abundant number, since it is smaller than the sum of its proper divisors (137593351536).

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

61324202640 is a wasteful number, since it uses less digits than its factorization.

61324202640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30677 (or 30671 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 61324202640 its reverse (4620242316), we get a palindrome (65944444956).

The spelling of 61324202640 in words is "sixty-one billion, three hundred twenty-four million, two hundred two thousand, six hundred forty".