61510071464 has 8 divisors (see below), whose sum is σ = 115331384010. Its totient is φ = 30755035728.

The previous prime is 61510071407. The next prime is 61510071499. The reversal of 61510071464 is 46417001516.

It can be written as a sum of positive squares in only one way, i.e., 36469540900 + 25040530564 = 190970^2 + 158242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3844379459 + ... + 3844379474.

Almost surely, 2^61510071464 is an apocalyptic number.

It is an amenable number.

61510071464 is a deficient number, since it is larger than the sum of its proper divisors (53821312546).

61510071464 is a wasteful number, since it uses less digits than its factorization.

61510071464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7688758939 (or 7688758935 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 61510071464 in words is "sixty-one billion, five hundred ten million, seventy-one thousand, four hundred sixty-four".