61278982339740 has 96 divisors (see below), whose sum is σ = 187302341834496. Its totient is φ = 14845756515840.

The previous prime is 61278982339727. The next prime is 61278982339763. The reversal of 61278982339740 is 4793328987216.

It is a super-2 number, since 2×61278982339740² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 29476417 + ... + 31486776.

It is an arithmetic number, because the mean of its divisors is an integer number (1951066060776).

Almost surely, 2^{61278982339740} is an apocalyptic number.

61278982339740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61278982339740 is an abundant number, since it is smaller than the sum of its proper divisors (126023359494756).

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

61278982339740 is a wasteful number, since it uses less digits than its factorization.

61278982339740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60964739 (or 60964737 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 69.

The spelling of 61278982339740 in words is "sixty-one trillion, two hundred seventy-eight billion, nine hundred eighty-two million, three hundred thirty-nine thousand, seven hundred forty".