73242442157 has 8 divisors (see below), whose sum is σ = 73454542200. Its totient is φ = 73030465024.

The previous prime is 73242442139. The next prime is 73242442177. The reversal of 73242442157 is 75124424237.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12719553961 + 60522888196 = 112781^2 + 246014^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73242442157 - 2⁸ = 73242441901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73242442177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1238069 + ... + 1295877.

It is an arithmetic number, because the mean of its divisors is an integer number (9181817775).

Almost surely, 2^73242442157 is an apocalyptic number.

It is an amenable number.

73242442157 is a deficient number, since it is larger than the sum of its proper divisors (212100043).

73242442157 is a wasteful number, since it uses less digits than its factorization.

73242442157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61455.

The product of its digits is 376320, while the sum is 41.

The spelling of 73242442157 in words is "seventy-three billion, two hundred forty-two million, four hundred forty-two thousand, one hundred fifty-seven".