61954686 has 64 divisors (see below), whose sum is σ = 145635840. Its totient is φ = 19483200.

The previous prime is 61954667. The next prime is 61954691. The reversal of 61954686 is 68645916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102786 + ... + 103386.

It is an arithmetic number, because the mean of its divisors is an integer number (2275560).

Almost surely, 2^61954686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61954686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72817920).

61954686 is an abundant number, since it is smaller than the sum of its proper divisors (83681154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61954686 is a wasteful number, since it uses less digits than its factorization.

61954686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 712 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 61954686 is about 7871.1299061825. The cubic root of 61954686 is about 395.6927138651.

The spelling of 61954686 in words is "sixty-one million, nine hundred fifty-four thousand, six hundred eighty-six".