61049769984 has 520 divisors, whose sum is σ = 211352438528. Its totient is φ = 17199267840.

The previous prime is 61049769973. The next prime is 61049770003. The reversal of 61049769984 is 48996794016.

61049769984 is a `hidden beast` number, since 6 + 1 + 0 + 497 + 69 + 9 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 225275769 + ... + 225276039.

Almost surely, 2^61049769984 is an apocalyptic number.

61049769984 is a gapful number since it is divisible by the number (64) 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 61049769984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105676219264).

61049769984 is an abundant number, since it is smaller than the sum of its proper divisors (150302668544).

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

61049769984 is an equidigital number, since it uses as much as digits as its factorization.

61049769984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 61049769984 in words is "sixty-one billion, forty-nine million, seven hundred sixty-nine thousand, nine hundred eighty-four".