53694374778 has 96 divisors (see below), whose sum is σ = 134674892352. Its totient is φ = 15280243200.

The previous prime is 53694374743. The next prime is 53694374779. The reversal of 53694374778 is 87747349635.

53694374778 is a `hidden beast` number, since 536 + 94 + 3 + 7 + 4 + 7 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (53694374779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1534425 + ... + 1569027.

It is an arithmetic number, because the mean of its divisors is an integer number (1402863462).

Almost surely, 2^53694374778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53694374778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67337446176).

53694374778 is an abundant number, since it is smaller than the sum of its proper divisors (80980517574).

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

53694374778 is a wasteful number, since it uses less digits than its factorization.

53694374778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35100 (or 35097 counting only the distinct ones).

The product of its digits is 106686720, while the sum is 63.

The spelling of 53694374778 in words is "fifty-three billion, six hundred ninety-four million, three hundred seventy-four thousand, seven hundred seventy-eight".