7721507101461 has 16 divisors (see below), whose sum is σ = 10398721296000. Its totient is φ = 5095996315200.

The previous prime is 7721507101447. The next prime is 7721507101573. The reversal of 7721507101461 is 1641017051277.

It is not a de Polignac number, because 7721507101461 - 2²³ = 7721498712853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721507101661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419040 + ... + 3952038.

It is an arithmetic number, because the mean of its divisors is an integer number (649920081000).

Almost surely, 2^{7721507101461} is an apocalyptic number.

It is an amenable number.

7721507101461 is a deficient number, since it is larger than the sum of its proper divisors (2677214194539).

7721507101461 is a wasteful number, since it uses less digits than its factorization.

7721507101461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540316.

The product of its (nonzero) digits is 82320, while the sum is 42.

The spelling of 7721507101461 in words is "seven trillion, seven hundred twenty-one billion, five hundred seven million, one hundred one thousand, four hundred sixty-one".