61490708480 has 120 divisors (see below), whose sum is σ = 151569132288. Its totient is φ = 23930339328.

The previous prime is 61490708479. The next prime is 61490708519. The reversal of 61490708480 is 8480709416.

It is a super-2 number, since 2×61490708480² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3020897 + ... + 3041183.

Almost surely, 2^61490708480 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 61490708480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75784566144).

61490708480 is an abundant number, since it is smaller than the sum of its proper divisors (90078423808).

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

61490708480 is an equidigital number, since it uses as much as digits as its factorization.

61490708480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20357 (or 20331 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 61490708480 in words is "sixty-one billion, four hundred ninety million, seven hundred eight thousand, four hundred eighty".