15420544770125 has 16 divisors (see below), whose sum is σ = 20994370772544. Its totient is φ = 11214941650000.

The previous prime is 15420544770121. The next prime is 15420544770199. The reversal of 15420544770125 is 52107744502451.

It is not a de Polignac number, because 15420544770125 - 2² = 15420544770121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15420544770125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420544770121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5607469451 + ... + 5607472200.

It is an arithmetic number, because the mean of its divisors is an integer number (1312148173284).

Almost surely, 2^{15420544770125} is an apocalyptic number.

It is an amenable number.

15420544770125 is a deficient number, since it is larger than the sum of its proper divisors (5573826002419).

15420544770125 is a wasteful number, since it uses less digits than its factorization.

15420544770125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11214941677 (or 11214941667 counting only the distinct ones).

The product of its (nonzero) digits is 1568000, while the sum is 47.

The spelling of 15420544770125 in words is "fifteen trillion, four hundred twenty billion, five hundred forty-four million, seven hundred seventy thousand, one hundred twenty-five".