61961480 has 96 divisors (see below), whose sum is σ = 164303640. Its totient is φ = 20966400.

The previous prime is 61961477. The next prime is 61961519. The reversal of 61961480 is 8416916.

It can be written as a sum of positive squares in 4 ways, for example, as 46485124 + 15476356 = 6818^2 + 3934^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 61961480.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197804 + ... + 198116.

Almost surely, 2^61961480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61961480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82151820).

61961480 is an abundant number, since it is smaller than the sum of its proper divisors (102342160).

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

61961480 is a wasteful number, since it uses less digits than its factorization.

61961480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 61961480 is about 7871.5614715252. The cubic root of 61961480 is about 395.7071773287.

The spelling of 61961480 in words is "sixty-one million, nine hundred sixty-one thousand, four hundred eighty".