45531781641215 has 4 divisors (see below), whose sum is σ = 54638137969464. Its totient is φ = 36425425312968.

The previous prime is 45531781641113. The next prime is 45531781641221. The reversal of 45531781641215 is 51214618713554.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45531781641215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4553178164117 + ... + 4553178164126.

It is an arithmetic number, because the mean of its divisors is an integer number (13659534492366).

Almost surely, 2^{45531781641215} is an apocalyptic number.

45531781641215 is a deficient number, since it is larger than the sum of its proper divisors (9106356328249).

45531781641215 is an equidigital number, since it uses as much as digits as its factorization.

45531781641215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106356328248.

The product of its digits is 4032000, while the sum is 53.

The spelling of 45531781641215 in words is "forty-five trillion, five hundred thirty-one billion, seven hundred eighty-one million, six hundred forty-one thousand, two hundred fifteen".