61621334015 has 8 divisors (see below), whose sum is σ = 73951297488. Its totient is φ = 49293269440.

The previous prime is 61621333937. The next prime is 61621334029. The reversal of 61621334015 is 51043312616.

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

It is not a de Polignac number, because 61621334015 - 2⁸ = 61621333759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402326 + ... + 533955.

It is an arithmetic number, because the mean of its divisors is an integer number (9243912186).

Almost surely, 2^61621334015 is an apocalyptic number.

61621334015 is a deficient number, since it is larger than the sum of its proper divisors (12329963473).

61621334015 is a wasteful number, since it uses less digits than its factorization.

61621334015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949449.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 61621334015 in words is "sixty-one billion, six hundred twenty-one million, three hundred thirty-four thousand, fifteen".