61643757265374 has 16 divisors (see below), whose sum is σ = 123366901229712. Its totient is φ = 20534687971968.

The previous prime is 61643757265357. The next prime is 61643757265379. The reversal of 61643757265374 is 47356275734616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61643757265379) 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, 3307769029 + ... + 3307787664.

It is an arithmetic number, because the mean of its divisors is an integer number (7710431326857).

Almost surely, 2^{61643757265374} is an apocalyptic number.

61643757265374 is an abundant number, since it is smaller than the sum of its proper divisors (61723143964338).

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

61643757265374 is a wasteful number, since it uses less digits than its factorization.

61643757265374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615558251.

The product of its digits is 533433600, while the sum is 66.

The spelling of 61643757265374 in words is "sixty-one trillion, six hundred forty-three billion, seven hundred fifty-seven million, two hundred sixty-five thousand, three hundred seventy-four".