7198401561 has 16 divisors (see below), whose sum is σ = 10360741440. Its totient is φ = 4419253440.

The previous prime is 7198401557. The next prime is 7198401571. The reversal of 7198401561 is 1651048917.

It is not a de Polignac number, because 7198401561 - 2² = 7198401557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7198401571) 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, 202791 + ... + 235628.

It is an arithmetic number, because the mean of its divisors is an integer number (647546340).

Almost surely, 2^7198401561 is an apocalyptic number.

It is an amenable number.

7198401561 is a deficient number, since it is larger than the sum of its proper divisors (3162339879).

7198401561 is a wasteful number, since it uses less digits than its factorization.

7198401561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438856.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 7198401561 is about 84843.3943274313. The cubic root of 7198401561 is about 1930.8358627200.

The spelling of 7198401561 in words is "seven billion, one hundred ninety-eight million, four hundred one thousand, five hundred sixty-one".