61913551197 has 8 divisors (see below), whose sum is σ = 82588280320. Its totient is φ = 41257261440.

The previous prime is 61913551181. The next prime is 61913551223. The reversal of 61913551197 is 79115531916.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61913551197 - 2⁴ = 61913551181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61913551097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4602004 + ... + 4615437.

It is an arithmetic number, because the mean of its divisors is an integer number (10323535040).

Almost surely, 2^61913551197 is an apocalyptic number.

It is an amenable number.

61913551197 is a deficient number, since it is larger than the sum of its proper divisors (20674729123).

61913551197 is a wasteful number, since it uses less digits than its factorization.

61913551197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9219683.

The product of its digits is 255150, while the sum is 48.

The spelling of 61913551197 in words is "sixty-one billion, nine hundred thirteen million, five hundred fifty-one thousand, one hundred ninety-seven".