61577889 has 8 divisors (see below), whose sum is σ = 82227840. Its totient is φ = 40989936.

The previous prime is 61577869. The next prime is 61577897. The reversal of 61577889 is 98877516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61577889 - 2¹² = 61573793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61577809) 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, 13129 + ... + 17190.

It is an arithmetic number, because the mean of its divisors is an integer number (10278480).

Almost surely, 2^61577889 is an apocalyptic number.

It is an amenable number.

61577889 is a deficient number, since it is larger than the sum of its proper divisors (20649951).

61577889 is a wasteful number, since it uses less digits than its factorization.

61577889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30999.

The product of its digits is 846720, while the sum is 51.

The square root of 61577889 is about 7847.1580205830. The cubic root of 61577889 is about 394.8889053594. Note that the first 3 decimals are identical.

The spelling of 61577889 in words is "sixty-one million, five hundred seventy-seven thousand, eight hundred eighty-nine".