61868464 has 20 divisors (see below), whose sum is σ = 136994704.
Its totient is φ = 26515008.
The previous prime is 61868461. The next prime is 61868473. The reversal of 61868464 is 46486816.
It is a self number, because there is not a number n which added to its sum of digits gives 61868464.
It is not an unprimeable number, because it can be changed into a prime (61868461) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276087 + ... + 276310.
Almost surely, 261868464 is an apocalyptic number.
It is an amenable number.
61868464 is an abundant number, since it is smaller than the sum of its proper divisors (75126240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
61868464 is a wasteful number, since it uses less digits than its factorization.
61868464 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 552412 (or 552406 counting only the distinct ones).
The product of its digits is 221184, while the sum is 43.
The square root of 61868464 is about 7865.6508948720.
The cubic root of 61868464 is about 395.5090675119.
The spelling of 61868464 in words is "sixty-one million, eight hundred sixty-eight thousand, four hundred sixty-four".