61963978 has 32 divisors (see below), whose sum is σ = 105431040. Its totient is φ = 27157680.

The previous prime is 61963973. The next prime is 61963999. The reversal of 61963978 is 87936916.

It is not an unprimeable number, because it can be changed into a prime (61963973) 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, 25951 + ... + 28237.

It is an arithmetic number, because the mean of its divisors is an integer number (3294720).

Almost surely, 2^61963978 is an apocalyptic number.

61963978 is a deficient number, since it is larger than the sum of its proper divisors (43467062).

61963978 is a wasteful number, since it uses less digits than its factorization.

61963978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362.

The product of its digits is 489888, while the sum is 49.

The square root of 61963978 is about 7871.7201423831. The cubic root of 61963978 is about 395.7124949510.

The spelling of 61963978 in words is "sixty-one million, nine hundred sixty-three thousand, nine hundred seventy-eight".