61115226615 has 24 divisors (see below), whose sum is σ = 105966734640. Its totient is φ = 32584425984.

The previous prime is 61115226583. The next prime is 61115226643. The reversal of 61115226615 is 51662251116.

61115226615 is a `hidden beast` number, since 6 + 1 + 1 + 15 + 2 + 26 + 615 = 666.

It is not a de Polignac number, because 61115226615 - 2⁵ = 61115226583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61115226615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71677 + ... + 356886.

It is an arithmetic number, because the mean of its divisors is an integer number (4415280610).

Almost surely, 2^61115226615 is an apocalyptic number.

61115226615 is a deficient number, since it is larger than the sum of its proper divisors (44851508025).

61115226615 is a wasteful number, since it uses less digits than its factorization.

61115226615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431743 (or 431740 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The spelling of 61115226615 in words is "sixty-one billion, one hundred fifteen million, two hundred twenty-six thousand, six hundred fifteen".