61545111340 has 12 divisors (see below), whose sum is σ = 129244733856. Its totient is φ = 24618044528.

The previous prime is 61545111307. The next prime is 61545111347. The reversal of 61545111340 is 4311154516.

It is not an unprimeable number, because it can be changed into a prime (61545111347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538627764 + ... + 1538627803.

It is an arithmetic number, because the mean of its divisors is an integer number (10770394488).

Almost surely, 2^61545111340 is an apocalyptic number.

It is an amenable number.

61545111340 is an abundant number, since it is smaller than the sum of its proper divisors (67699622516).

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

61545111340 is a wasteful number, since it uses less digits than its factorization.

61545111340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3077255576 (or 3077255574 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 61545111340 its reverse (4311154516), we get a palindrome (65856265856).

The spelling of 61545111340 in words is "sixty-one billion, five hundred forty-five million, one hundred eleven thousand, three hundred forty".