122978733525 has 18 divisors (see below), whose sum is σ = 220268576450. Its totient is φ = 65588657760.

The previous prime is 122978733503. The next prime is 122978733529. The reversal of 122978733525 is 525337879221.

122978733525 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 7 + 87 + 33 + 525 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1266363396 + 121712370129 = 35586^2 + 348873^2 .

It is not a de Polignac number, because 122978733525 - 2¹⁸ = 122978471381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122978733529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 273285850 + ... + 273286299.

Almost surely, 2^122978733525 is an apocalyptic number.

122978733525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

122978733525 is a deficient number, since it is larger than the sum of its proper divisors (97289842925).

122978733525 is a wasteful number, since it uses less digits than its factorization.

122978733525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546572165 (or 546572157 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The spelling of 122978733525 in words is "one hundred twenty-two billion, nine hundred seventy-eight million, seven hundred thirty-three thousand, five hundred twenty-five".