187127780180245 has 16 divisors (see below), whose sum is σ = 228254575562352. Its totient is φ = 147235162152960.

The previous prime is 187127780180221. The next prime is 187127780180251. The reversal of 187127780180245 is 542081087721781.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 62155548086641 + 124972232093604 = 7883879^2 + 11179098^2 .

It is not a de Polignac number, because 187127780180245 - 2⁴¹ = 184928756924693 is a prime.

It is a super-2 number, since 2×187127780180245² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

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 15 ways as a sum of consecutive naturals, for example, 23451042 + ... + 30400771.

It is an arithmetic number, because the mean of its divisors is an integer number (14265910972647).

Almost surely, 2^{187127780180245} is an apocalyptic number.

It is an amenable number.

187127780180245 is a deficient number, since it is larger than the sum of its proper divisors (41126795382107).

187127780180245 is a wasteful number, since it uses less digits than its factorization.

187127780180245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53863272.

The product of its (nonzero) digits is 14049280, while the sum is 61.

The spelling of 187127780180245 in words is "one hundred eighty-seven trillion, one hundred twenty-seven billion, seven hundred eighty million, one hundred eighty thousand, two hundred forty-five".