61642035240 has 32 divisors (see below), whose sum is σ = 184926106080. Its totient is φ = 16437876032.

The previous prime is 61642035239. The next prime is 61642035251. The reversal of 61642035240 is 4253024616.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256841694 + ... + 256841933.

It is an arithmetic number, because the mean of its divisors is an integer number (5778940815).

Almost surely, 2^61642035240 is an apocalyptic number.

61642035240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61642035240 is an abundant number, since it is smaller than the sum of its proper divisors (123284070840).

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

61642035240 is a wasteful number, since it uses less digits than its factorization.

61642035240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513683641 (or 513683637 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 61642035240 its reverse (4253024616), we get a palindrome (65895059856).

The spelling of 61642035240 in words is "sixty-one billion, six hundred forty-two million, thirty-five thousand, two hundred forty".