2157399879598 has 16 divisors (see below), whose sum is σ = 3323639267424. Its totient is φ = 1049521479840.

The previous prime is 2157399879553. The next prime is 2157399879611. The reversal of 2157399879598 is 8959789937512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3098511 + ... + 3730357.

It is an arithmetic number, because the mean of its divisors is an integer number (207727454214).

Almost surely, 2^{2157399879598} is an apocalyptic number.

2157399879598 is a deficient number, since it is larger than the sum of its proper divisors (1166239387826).

2157399879598 is a wasteful number, since it uses less digits than its factorization.

2157399879598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678027.

The product of its digits is 3086294400, while the sum is 82.

The spelling of 2157399879598 in words is "two trillion, one hundred fifty-seven billion, three hundred ninety-nine million, eight hundred seventy-nine thousand, five hundred ninety-eight".