61621486 has 4 divisors (see below), whose sum is σ = 92432232. Its totient is φ = 30810742.

The previous prime is 61621471. The next prime is 61621489. The reversal of 61621486 is 68412616.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61621489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15405370 + ... + 15405373.

It is an arithmetic number, because the mean of its divisors is an integer number (23108058).

Almost surely, 2^61621486 is an apocalyptic number.

61621486 is a deficient number, since it is larger than the sum of its proper divisors (30810746).

61621486 is a wasteful number, since it uses less digits than its factorization.

61621486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30810745.

The product of its digits is 13824, while the sum is 34.

The square root of 61621486 is about 7849.9354137470. The cubic root of 61621486 is about 394.9820768452.

The spelling of 61621486 in words is "sixty-one million, six hundred twenty-one thousand, four hundred eighty-six".