74252245815 has 48 divisors (see below), whose sum is σ = 140455710720. Its totient is φ = 35987893440.

The previous prime is 74252245811. The next prime is 74252245877. The reversal of 74252245815 is 51854225247.

74252245815 is a `hidden beast` number, since 7 + 4 + 2 + 522 + 45 + 81 + 5 = 666.

It is not a de Polignac number, because 74252245815 - 2² = 74252245811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74252245811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1399054 + ... + 1451156.

It is an arithmetic number, because the mean of its divisors is an integer number (2926160640).

Almost surely, 2^74252245815 is an apocalyptic number.

74252245815 is a deficient number, since it is larger than the sum of its proper divisors (66203464905).

74252245815 is a wasteful number, since it uses less digits than its factorization.

74252245815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55004 (or 55001 counting only the distinct ones).

The product of its digits is 896000, while the sum is 45.

The spelling of 74252245815 in words is "seventy-four billion, two hundred fifty-two million, two hundred forty-five thousand, eight hundred fifteen".