61151032215 has 80 divisors (see below), whose sum is σ = 134915635008. Its totient is φ = 25804376064.

The previous prime is 61151032199. The next prime is 61151032219. The reversal of 61151032215 is 51223015116.

61151032215 is a `hidden beast` number, since 611 + 5 + 1 + 0 + 32 + 2 + 15 = 666.

It is not a de Polignac number, because 61151032215 - 2⁴ = 61151032199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61151032219) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 792762 + ... + 866471.

Almost surely, 2^61151032215 is an apocalyptic number.

61151032215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61151032215 is an abundant number, since it is smaller than the sum of its proper divisors (73764602793).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61151032215 is a wasteful number, since it uses less digits than its factorization.

61151032215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659270 (or 1659261 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 61151032215 in words is "sixty-one billion, one hundred fifty-one million, thirty-two thousand, two hundred fifteen".