61894151 has 4 divisors (see below), whose sum is σ = 67520904. Its totient is φ = 56267400.

The previous prime is 61894141. The next prime is 61894177. The reversal of 61894151 is 15149816.

61894151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61894151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61894121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2813360 + ... + 2813381.

It is an arithmetic number, because the mean of its divisors is an integer number (16880226).

Almost surely, 2^61894151 is an apocalyptic number.

61894151 is a deficient number, since it is larger than the sum of its proper divisors (5626753).

61894151 is a wasteful number, since it uses less digits than its factorization.

61894151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626752.

The product of its digits is 8640, while the sum is 35.

The square root of 61894151 is about 7867.2835845672. The cubic root of 61894151 is about 395.5637967178.

The spelling of 61894151 in words is "sixty-one million, eight hundred ninety-four thousand, one hundred fifty-one".