151961327661 has 24 divisors (see below), whose sum is σ = 239840644960. Its totient is φ = 85013327520.

The previous prime is 151961327653. The next prime is 151961327711. The reversal of 151961327661 is 166723169151.

It is a happy number.

It is not a de Polignac number, because 151961327661 - 2³ = 151961327653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151961327661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151961307661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16096291 + ... + 16105728.

Almost surely, 2^151961327661 is an apocalyptic number.

151961327661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

151961327661 is a deficient number, since it is larger than the sum of its proper divisors (87879317299).

151961327661 is a wasteful number, since it uses less digits than its factorization.

151961327661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32202057 (or 32202046 counting only the distinct ones).

The product of its digits is 408240, while the sum is 48.

The spelling of 151961327661 in words is "one hundred fifty-one billion, nine hundred sixty-one million, three hundred twenty-seven thousand, six hundred sixty-one".