6115515421 has 8 divisors (see below), whose sum is σ = 6335588864. Its totient is φ = 5896866960.

The previous prime is 6115515409. The next prime is 6115515431. The reversal of 6115515421 is 1245155116.

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

It is a cyclic number.

It is not a de Polignac number, because 6115515421 - 2¹⁷ = 6115384349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6115515431) 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, 347505 + ... + 364678.

It is an arithmetic number, because the mean of its divisors is an integer number (791948608).

Almost surely, 2^6115515421 is an apocalyptic number.

It is an amenable number.

6115515421 is a deficient number, since it is larger than the sum of its proper divisors (220073443).

6115515421 is a wasteful number, since it uses less digits than its factorization.

6115515421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712491.

The product of its digits is 6000, while the sum is 31.

The square root of 6115515421 is about 78201.7609840085. The cubic root of 6115515421 is about 1828.7079596609.

The spelling of 6115515421 in words is "six billion, one hundred fifteen million, five hundred fifteen thousand, four hundred twenty-one".