61000554 has 16 divisors (see below), whose sum is σ = 127305792. Its totient is φ = 19449408.

The previous prime is 61000553. The next prime is 61000571. The reversal of 61000554 is 45500016.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61000554.

It is not an unprimeable number, because it can be changed into a prime (61000553) 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, 220879 + ... + 221154.

It is an arithmetic number, because the mean of its divisors is an integer number (7956612).

Almost surely, 2^61000554 is an apocalyptic number.

61000554 is an abundant number, since it is smaller than the sum of its proper divisors (66305238).

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

61000554 is a wasteful number, since it uses less digits than its factorization.

61000554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442061.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61000554 is about 7810.2851420419. The cubic root of 61000554 is about 393.6509100112.

The spelling of 61000554 in words is "sixty-one million, five hundred fifty-four", and thus it is an aban number.