149102170398721 has 4 divisors (see below), whose sum is σ = 150421658632452. Its totient is φ = 147782682164992.

The previous prime is 149102170398677. The next prime is 149102170398757. The reversal of 149102170398721 is 127893071201941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57834336702321 + 91267833696400 = 7604889^2 + 9553420^2 .

It is a cyclic number.

It is not a de Polignac number, because 149102170398721 - 2¹³ = 149102170390529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149102170398221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659744116696 + ... + 659744116921.

It is an arithmetic number, because the mean of its divisors is an integer number (37605414658113).

Almost surely, 2^{149102170398721} is an apocalyptic number.

It is an amenable number.

149102170398721 is a deficient number, since it is larger than the sum of its proper divisors (1319488233731).

149102170398721 is a wasteful number, since it uses less digits than its factorization.

149102170398721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319488233730.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 149102170398721 in words is "one hundred forty-nine trillion, one hundred two billion, one hundred seventy million, three hundred ninety-eight thousand, seven hundred twenty-one".