45149215402 has 4 divisors (see below), whose sum is σ = 67723823106. Its totient is φ = 22574607700.

The previous prime is 45149215357. The next prime is 45149215409. The reversal of 45149215402 is 20451294154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20451294154 = 2 ⋅10225647077.

It can be written as a sum of positive squares in only one way, i.e., 36168052041 + 8981163361 = 190179^2 + 94769^2 .

It is not an unprimeable number, because it can be changed into a prime (45149215409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11287303849 + ... + 11287303852.

Almost surely, 2^45149215402 is an apocalyptic number.

45149215402 is a deficient number, since it is larger than the sum of its proper divisors (22574607704).

45149215402 is a wasteful number, since it uses less digits than its factorization.

45149215402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22574607703.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 45149215402 in words is "forty-five billion, one hundred forty-nine million, two hundred fifteen thousand, four hundred two".