201977108825 has 6 divisors (see below), whose sum is σ = 250451614974. Its totient is φ = 161581687040.

The previous prime is 201977108807. The next prime is 201977108843. The reversal of 201977108825 is 528801779102.

It is an interprime number because it is at equal distance from previous prime (201977108807) and next prime (201977108843).

It can be written as a sum of positive squares in 3 ways, for example, as 3531806041 + 198445302784 = 59429^2 + 445472^2 .

It is not a de Polignac number, because 201977108825 - 2¹⁴ = 201977092441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4039542152 + ... + 4039542201.

It is an arithmetic number, because the mean of its divisors is an integer number (41741935829).

Almost surely, 2^201977108825 is an apocalyptic number.

201977108825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

201977108825 is a deficient number, since it is larger than the sum of its proper divisors (48474506149).

201977108825 is an equidigital number, since it uses as much as digits as its factorization.

201977108825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079084363 (or 8079084358 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 201977108825 in words is "two hundred one billion, nine hundred seventy-seven million, one hundred eight thousand, eight hundred twenty-five".