61889481 has 16 divisors (see below), whose sum is σ = 95675520. Its totient is φ = 39465360.

The previous prime is 61889461. The next prime is 61889483. The reversal of 61889481 is 18498816.

It is not a de Polignac number, because 61889481 - 2⁹ = 61888969 is a prime.

It is a super-2 number, since 2×61889481² = 7660615716898722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61889483) 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, 49210 + ... + 50451.

It is an arithmetic number, because the mean of its divisors is an integer number (5979720).

Almost surely, 2^61889481 is an apocalyptic number.

It is an amenable number.

61889481 is a deficient number, since it is larger than the sum of its proper divisors (33786039).

61889481 is a wasteful number, since it uses less digits than its factorization.

61889481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99693 (or 99687 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 61889481 is about 7866.9867802101. The cubic root of 61889481 is about 395.5538478543.

The spelling of 61889481 in words is "sixty-one million, eight hundred eighty-nine thousand, four hundred eighty-one".