61927649280 has 520 divisors, whose sum is σ = 253756131552. Its totient is φ = 14152237056.

The previous prime is 61927649279. The next prime is 61927649341. The reversal of 61927649280 is 8294672916.

61927649280 is a `hidden beast` number, since 6 + 1 + 9 + 2 + 76 + 492 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11609494 + ... + 11614826.

Almost surely, 2^61927649280 is an apocalyptic number.

61927649280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61927649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126878065776).

61927649280 is an abundant number, since it is smaller than the sum of its proper divisors (191828482272).

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

61927649280 is an equidigital number, since it uses as much as digits as its factorization.

61927649280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381 (or 5350 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 61927649280 in words is "sixty-one billion, nine hundred twenty-seven million, six hundred forty-nine thousand, two hundred eighty".