61620395199 has 16 divisors (see below), whose sum is σ = 90636744960. Its totient is φ = 36926077760.

The previous prime is 61620395171. The next prime is 61620395203. The reversal of 61620395199 is 99159302616.

It is not a de Polignac number, because 61620395199 - 2¹³ = 61620387007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620395299) 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, 10487427 + ... + 10493300.

It is an arithmetic number, because the mean of its divisors is an integer number (5664796560).

Almost surely, 2^61620395199 is an apocalyptic number.

61620395199 is a deficient number, since it is larger than the sum of its proper divisors (29016349761).

61620395199 is a wasteful number, since it uses less digits than its factorization.

61620395199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20980830.

The product of its (nonzero) digits is 787320, while the sum is 51.

The spelling of 61620395199 in words is "sixty-one billion, six hundred twenty million, three hundred ninety-five thousand, one hundred ninety-nine".