1201551551504 has 10 divisors (see below), whose sum is σ = 2328006131070. Its totient is φ = 600775775744.

The previous prime is 1201551551471. The next prime is 1201551551521. The reversal of 1201551551504 is 4051551551021.

It can be written as a sum of positive squares in only one way, i.e., 1198543248400 + 3008303104 = 1094780^2 + 54848^2 .

It is a super-2 number, since 2×1201551551504² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37548485969 + ... + 37548486000.

It is an arithmetic number, because the mean of its divisors is an integer number (232800613107).

Almost surely, 2^{1201551551504} is an apocalyptic number.

It is an amenable number.

1201551551504 is a deficient number, since it is larger than the sum of its proper divisors (1126454579566).

1201551551504 is an equidigital number, since it uses as much as digits as its factorization.

1201551551504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75096971977 (or 75096971971 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 35.

The spelling of 1201551551504 in words is "one trillion, two hundred one billion, five hundred fifty-one million, five hundred fifty-one thousand, five hundred four".