74319503778 has 40 divisors (see below), whose sum is σ = 179340801948. Its totient is φ = 22867538976.

The previous prime is 74319503767. The next prime is 74319503803. The reversal of 74319503778 is 87730591347.

It can be written as a sum of positive squares in 2 ways, for example, as 51818603769 + 22500900009 = 227637^2 + 150003^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17642601 + ... + 17646812.

Almost surely, 2^74319503778 is an apocalyptic number.

74319503778 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

74319503778 is an abundant number, since it is smaller than the sum of its proper divisors (105021298170).

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

74319503778 is a wasteful number, since it uses less digits than its factorization.

74319503778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35289440 (or 35289431 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 54.

The spelling of 74319503778 in words is "seventy-four billion, three hundred nineteen million, five hundred three thousand, seven hundred seventy-eight".