61894911 has 16 divisors (see below), whose sum is σ = 90768384. Its totient is φ = 37277664.

The previous prime is 61894901. The next prime is 61894919. The reversal of 61894911 is 11949816.

It is not a de Polignac number, because 61894911 - 2¹¹ = 61892863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 61894911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61894919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15051 + ... + 18716.

It is an arithmetic number, because the mean of its divisors is an integer number (5673024).

Almost surely, 2^61894911 is an apocalyptic number.

61894911 is a deficient number, since it is larger than the sum of its proper divisors (28873473).

61894911 is a wasteful number, since it uses less digits than its factorization.

61894911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33830.

The product of its digits is 15552, while the sum is 39.

The square root of 61894911 is about 7867.3318857158. The cubic root of 61894911 is about 395.5654157575.

The spelling of 61894911 in words is "sixty-one million, eight hundred ninety-four thousand, nine hundred eleven".