61163630544 has 20 divisors (see below), whose sum is σ = 158006045696. Its totient is φ = 20387876832.

The previous prime is 61163630543. The next prime is 61163630573. The reversal of 61163630544 is 44503636116.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61163630543) 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, 637121104 + ... + 637121199.

Almost surely, 2^61163630544 is an apocalyptic number.

It is an amenable number.

61163630544 is an abundant number, since it is smaller than the sum of its proper divisors (96842415152).

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

61163630544 is a wasteful number, since it uses less digits than its factorization.

61163630544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274242314 (or 1274242308 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 61163630544 in words is "sixty-one billion, one hundred sixty-three million, six hundred thirty thousand, five hundred forty-four".