61506211340 has 24 divisors (see below), whose sum is σ = 147614907552. Its totient is φ = 21087843840.

The previous prime is 61506211303. The next prime is 61506211363. The reversal of 61506211340 is 4311260516.

It is a happy number.

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, 219664901 + ... + 219665180.

It is an arithmetic number, because the mean of its divisors is an integer number (6150621148).

Almost surely, 2^61506211340 is an apocalyptic number.

It is an amenable number.

61506211340 is an abundant number, since it is smaller than the sum of its proper divisors (86108696212).

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

61506211340 is a wasteful number, since it uses less digits than its factorization.

61506211340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439330097 (or 439330095 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 61506211340 its reverse (4311260516), we get a palindrome (65817471856).

The spelling of 61506211340 in words is "sixty-one billion, five hundred six million, two hundred eleven thousand, three hundred forty".