61651501505 has 32 divisors (see below), whose sum is σ = 83551564800. Its totient is φ = 43259641600.

The previous prime is 61651501493. The next prime is 61651501523. The reversal of 61651501505 is 50510515616.

61651501505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61651501505 - 2¹² = 61651497409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2281775 + ... + 2308635.

It is an arithmetic number, because the mean of its divisors is an integer number (2610986400).

Almost surely, 2^61651501505 is an apocalyptic number.

It is an amenable number.

61651501505 is a deficient number, since it is larger than the sum of its proper divisors (21900063295).

61651501505 is a wasteful number, since it uses less digits than its factorization.

61651501505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28345.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 61651501505 in words is "sixty-one billion, six hundred fifty-one million, five hundred one thousand, five hundred five".