61573557340 has 24 divisors (see below), whose sum is σ = 129318526512. Its totient is φ = 24626745600.

The previous prime is 61573557313. The next prime is 61573557341. The reversal of 61573557340 is 4375537516.

61573557340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61573557341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26740 + ... + 351940.

It is an arithmetic number, because the mean of its divisors is an integer number (5388271938).

Almost surely, 2^61573557340 is an apocalyptic number.

It is an amenable number.

61573557340 is an abundant number, since it is smaller than the sum of its proper divisors (67744969172).

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

61573557340 is a wasteful number, since it uses less digits than its factorization.

61573557340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334677 (or 334675 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 46.

The spelling of 61573557340 in words is "sixty-one billion, five hundred seventy-three million, five hundred fifty-seven thousand, three hundred forty".