161651115015610 has 32 divisors (see below), whose sum is σ = 318928386896064. Its totient is φ = 58503634896000.

The previous prime is 161651115015557. The next prime is 161651115015613. The reversal of 161651115015610 is 16510511156161.

It is a happy number.

161651115015610 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161651115015610² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161651115015613) 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, 3482336011 + ... + 3482382430.

It is an arithmetic number, because the mean of its divisors is an integer number (9966512090502).

Almost surely, 2^{161651115015610} is an apocalyptic number.

161651115015610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161651115015610 is a deficient number, since it is larger than the sum of its proper divisors (157277271880454).

161651115015610 is a wasteful number, since it uses less digits than its factorization.

161651115015610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6964718670.

The product of its (nonzero) digits is 27000, while the sum is 40.

The spelling of 161651115015610 in words is "one hundred sixty-one trillion, six hundred fifty-one billion, one hundred fifteen million, fifteen thousand, six hundred ten".